Mod By default, WordPress always shows all posts in reverse chronological order. So this could be one of three things:
1) A plugin conflict. (You know the routine: turn plugins off until you find the one causing the problem.)
2) A database problem.
3) Something else.
My money is on #1. You can temporarily disable all your plugins at once by using FTP to temporarily rename your plugins folder. If everything is back to normal, then one of your plugins (or a combination of two or more) is causing the issue.
I find it hard to believe that it could be #2, but I admit there is a 15% chance it could be #3. I don’t know what #3 could be, so let’s start with the easy one first.
