The went to showdown scares me for 25k hands. This should probably be higher unless you've been running really bad for 20k of the hands and have been properly folding (very very unlikely).
Your AF numbers look good, but this is a coincidence. It appears you are folding too much. This is obvious from your Went to Showdown Stats. If you change some of these folds into calls and some into raises, you'll keep about the same good AF numbers but will be going to showdown properly.
EDIT: Read Ed Miller's 'I know why you guys aren't crushing these low limit games post' immediately.
Right here!!!