I need to qualify this as not being a dupe of this question, well actually it is...but for Data Explorer not SO like the original.
When you change Questions per page, say 100 you land at a URL like this:
http://odata.stackexchange.com/stackoverflow/queries?order_by=popular&pagesize=100
The link for the "Page 2" button on that page is this:
http://odata.stackexchange.com/stackoverflow/queries?order_by=popular&page=2
It's missing the pagesize
query parameter currently, seems like it should be:
http://odata.stackexchange.com/stackoverflow/queries?order_by=popular&page=2&pagesize=100
Currently it's hopping around in a very unexpected way :)