I have tingered around with it a bit and came up with the same results nightmare came with.
Then I tried writing my username into the keyword box instead of the username box and the results suddenly started showing threads that start from the date I signed up.
From this point, I can give you the directions to the results filtered more if it allows.
Apply the method, then copy paste the thread title to another searchbox with specifying ypur username for it. It should work if there are those options.
Didn't check any further sorry. My wife is pushing me to watch the episode of this show called Forever and says she is growing jealous of jazzfanz and will become a jazz fan herself eventually. It's a pretty good show by the way. Worth giving a try.