Last post author is incorrect

Example Forum: http://www.giantbomb.com/diablo-iii/3030-20803/forums/

Thread: http://www.giantbomb.com/diablo-iii/3030-20803/forums/diablo-3-ps4-giantbomb-buddies-1465672/#8

Here, the least post is currently by me, but in the forum topic list, it shows that the OP is also the last poster (not me)... Despite having the correct last post time. Erp.

There is actually a post after yours that has been deleted, you just can't see it. It still should report yours as the most recent one, though.