My screen will show a couple of posts as being 7 seconds and 50 seconds ago on a particular thread, then list the next post and all the following one as being made at something like 11:50 PM yesterday.

No John.

^^
High on Lortabs

Clear you cookies,there's a link in the basement.

Is your time zone correct in your preferences?

Yes , all the time .

Did your screen get the vax?

Nope