Yep, we're on the same page. ...
I think the two problems probably stem from the same source, whatever that might be....I do think we've discovered something that the development folks can use as a starting point.
See, I know we are on the same page!

I hope IB folks will find a fix very soon from my/our problem descritpions.
To further complicate matters, what one user sees as 8 pages (at 5 posts per page), I see as one, since I have my preferences set to 40 posts per page...
Just to clarify, did you mean 15 posts per page? My findings were all under 15-post-per-page view using Firefox.
I thought the 15-post page-view was the default setting. I guess I have been happy with 15-post-per-page layout and didn't notice (nor recall) you can request it differently. If the phantom forum page problem you are experiencing has anything to do by setting a different parameter, I don't think this IB search engine is good at math at all.
Whatever the problems are, they surely have to find the right fix.