Strange Timestamping

For some odd reason, possibly related to the Performancing plug-in I use to blog, the time-stamps in the stories below are messed up.

I don't know how to fix that in Blogger

Update: I found out it was because Performancing seems to create a new post every time one edits an already published post. There is probably a way to avoid this, but it is poor usability to not have thought through this or made it blindingly obvious.

Oh well.