When I click on that link in Safari, it correctly goes to page 2 of the Example Questions on the Social Conventions site and scrolls down to my question. EDIT: Although I wasn't logged into Area51 in Safari.
But when I click on that link in Firefox 39, it goes to the top of page 1 of the Example Questions. Not only that, but when I press CTRL-F in Firefox to search for my question, my question can't be found - not on page 1 or page 2. My question doesn't exist when using Firefox (on both Mac OS X and Windows XP).
But when I use the main Social Conventions site link, then my question shows up in Firefox.
When I click on the proposed question link in Firefox, it still shows me 40 questions on page 1. That is because the last question on the page is the same as the first question on page 2.
I just cleared my Firefox cache/cookies/etc as suggested by James. Then I logged into Meta.SE, and clicked on the link to my proposed question. The question appeared, but I noticed that I wasn't logged into Area51. So I logged into Area51 and then came back here to Meta, clicked on the proposed question link, and I can't see the question. So the problem only happens when I'm logged into Area51.
Also, I just logged into Area51 in Safari, and I see the same problem in Safari now. So it is happening on multiple browsers whenever I'm already logged into Area51.
I do not see this with any of my proposed questions for any Area51 site, except for my proposed questions on the Social Conventions site. I just proposed another question on Social Conventions, and I have the same problem with it.