Both of these are different issues related to scroll bar behavior:

 

1. I have my inbox grid set to sort by ItemCreated.  If I have it set to sort descending (ascending?), every time I open it, it is scrolled all the way to the bottom.  If I scroll to the top where it should be, and then close the grid, when I reopen the grid, it's scrolled all the way to the bottom again.  If I reverse the sort order, it opens scrolled all the way to the top, as it should.  So it's the sort order that causes this issue.

 

2. In the HTML pane I experience something similar, mainly with the horizontal scroll bar, but that's probably just because it's usually the horizontal part that requires scrolling.  In this instance I believe the culprit is HTML items with large tables.  I'll click on an item, and the HTML pane horizontal scroll bar is in the middle, instead of being scrolled so that the beginning/left of the page is visible.  I am guessing the same might happen vertically if a table was oversized vertically.