OK...
1. Am I experiencing difficulties? No. I have access GTP more or less continually from two separate networks over the last three days, and it has run faultlessly (thanks Jordan, your work this year has finally paid off!)
2. As already stated by vat_man Post Count Can Go Down As Well As Up. Posts in the Recyle Bin and Test Forum do not count towards your post count, therefore if you had contributed to a thread previously in (say) The Rumble Strip, but now in the Recycle Bin, you would notice a decrement to your number of posts.
3. Session Control, which tracks where you are and where you have been, is very difficult to do. It's easy to write so that the site knows who you are as you jump from page to page, but the work in tracking your path around the forum is tough - especially if you are using multiple windows. This is further compounded by cacheing, which can store previous versions of a page, and show them rather than the most up to date version. My advice is to look at the Last Poster and Last Post Time or a given thread/forum, and use that as a guide. It's what I do, and it works for me, not least because I often don't have time to read the whole of GTPlanet in a given visit. GTP also says "The time is now HH:MM", if that's not a reasonable approximation of the current time, you need to refresh the page.
4. No, you did not get 'banished'.
5. Hey, you didn't leave it terribly long before you started complaining about a lack of replies, did you? A whole 7 minutes! You have the patience of Job.
Hope that answers your points.