Okay, this is totally weird! Although I kept checking back when I first posted this, I never saw any replies then. I couldn't understand why I wasn't receiving any replies to my question, as RC folk are always very responsive.
Blazer88, I was puzzled by your 'short-term memory' comment at first, but now it makes perfect sense. I guess I'll never know what the problem was but I thank you for the link to my post! Now I can go back and read the replies.