Bug?

So I started moving my messages and started off at the last page. I opened each message on that page into a new tab so I can swap all the Inbox selections to Trash. Once I did that, I closed those extra tabs and went to my tab containing my last page inbox and refreshed the page. The Page now tells me "You haven't moved any convos into this folder, yet" with no option to go to the previous page and only an option to go back to the first page (Which I assume will start at the beginning again)

Question I have is should the page reload with the last [i]x[/i] messages you have or use a "Prev Page" button to jump back a page?

EDIT: actually looking, cause I now have 90 messages, when I get to the 90th on the supposed last page, it shows that the next page button is active, which leads to the "You haven't moved any convos into this folder, yet" message.