I go to the Item Exchange pretty regularly, and I'd noticed that the items always appeared in order from most recently posted to oldest. Well, today the first page of items was all in order as usual, but when I turned to page 2 the list suddenly inverted itself, showing items posted in early 2014. I turned back to page 1, and the items I had just been viewing were gone, replaced with the oldest items. So then I went to the last page, and sure enough, there were the items from the first page. It had all been turned backwards. 

I know it's a petty thing, I just didn't think it was supposed to do that, and wanted to find out if it was a bug.

It should be fine now, thank you for reporting.