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When I click "Next" it shows next page but some questions are same with previous page's questions. For Example in previous page I see some question then I click next and see same question again.

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    Works the same for me when browsing high-activity tags. Some questions indeed reappear when I go to next page. You're likely take some time to read through first page. As a result, when you click on Next page, newer questions push some of questions to second page. – gnat Jan 30 '12 at 11:04
  • I think Stack Overflow engineers can find solution to this problem. – Farid Movsumov Jan 30 '12 at 11:07
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    There isn't really a "problem"; At the time you click to view Page 2, what you see is the correct information for page 2. You are looking at a time-sorted list; you should not expect anything different, because anything different would be incorrect. – Andrew Barber Jan 30 '12 at 11:10
  • Andrew Barber what is the our purpose when we click to next? I want to see only other questions. I dont want to see same questions again. – Farid Movsumov Jan 30 '12 at 11:14
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    Stack Overflow is not a static website. Its data changes constantly. If you hit refresh on Page 1, you will also notice that the content there changes... new posts were made in the interim, therefore pushing other posts that were on Page 1 back to Page 2. That's exactly what you should expect from a dynamic website. If you want to see more items in a row in a static view, click to view more items per page; see the items on the bottom-right: 15 30 50 per page... click on the 50. – Andrew Barber Jan 30 '12 at 11:17
  • Thanks for your ideas @AndrewBarber but I am not agree with you. Page numbers is not important I want to see only new questions. I expect only this function from "next button". There must be solution for such problems in dynamic content sites. – Farid Movsumov Jan 30 '12 at 11:22
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    @Andrew He wants to see "new questions" in the sense of questions he hasn't seen already (i.e. those pushed back from page 1) – slhck Jan 30 '12 at 11:54
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    @slhck I would like the internets to remember all the websites I have visited and for google not to show me stuff I've already seen in a given search. That doesn't mean it's likely to happen or that it's a good idea. – JNK Jan 30 '12 at 15:15
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This isn't a bug - the system is doing exactly what you ask, which is giving you questions 16-30 in the current list. "The current list" is a different list pretty much every time you ask for it, of course, but that doesn't change what you asked for.

What you may be interested in is the answer to this question: RSS feed of your favorite tags. If you want to see new questions but only ever see a question once, the RSS 'news' model seems more appropriate than paginated a constantly-changing list.

See if it does what you want.

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Per screen shot it looks like you use default setting to display 15 questions per page. Per my recollection, "reappearing questions" were indeed a noticeable annoyance with this setting.

To me, the annoyance has gone when I changed settings to display 50 questions per page:

http://i.stack.imgur.com/l8whn.jpg

Not that above change magically fixed Next page - quite opposite, there are typically more of reappearing questions shown at 50-per-page setting. But somehow, difficult to tell why, just somehow this doesn't feel wrong anymore.

Maybe this is because with 50-per-page setting I spend much more time browsing first page questions so that seeing "reappearing questions" after I click Next feels justified.

Page numbers is not important I want to see only new questions. I expect only this function from "next button". There must be solution for such problems in dynamic content sites.

Sure there is a solution. For the case of SO though I doubt that it is worth implementing. Thing is what you want involves certain complication of UI. Just think of it...

  1. imagine user opening first page and keeping it hanging for a few hours
  2. imagine hundred or something of new questions appearing while first page hangs
  3. now, what would user expect when they click second page after above?

Would you expect just showing a second page as it would have been few hours ago? Would that feel right taking into account that as of now, this would be 22nd page not 2nd (remember hundred or something of new questions appearing while first page hangs)?

  • That would definitely feel wrong to me (and I guess not to me alone). To handle that, one would have to establish sort of update notification like one that is currently shown for new answers. Is it worth to implement such a solution? not to me - as I already mentioned, things just feel good enough to me after I switched to 50-per-page view.
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  • ı have voted up because good suggestion I hasn't noticed it. But this is not actual solution. – Farid Movsumov Jan 30 '12 at 13:14
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    @faridmovsumov well your problem isn't an actual problem so "not actual solution" seems appropriate. – JNK Jan 30 '12 at 15:14
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Question lists are cached for two minutes for all users - it's not really feasible for us to store which questions each user has seen during their session.

The other answers give good work-arounds for this intended behavior.

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