Hi Lowrider,
Yes, I think I see what you are referring to, that being what is shown under "Your Responses" in your profile. That appears to be by design. But to see a listing of threads in which you have participated, which shows the screen name of the "last word" poster and the date of that post, at the forum home page click on "View My Activity," or under that on "My Threads"/"7" or "14" or "30" days.
Best regards,
-- Al