It has happened to me but for a different reward. I couldn't understand why my acct. said I had 3300 pts but I wasn't able to redeem a reward that cost 3250 pts. I emailed my points and they did respond (although it took a few days) and stated that some of my points were "pending" therefore not actually available for use. I had to wait approx 2 weeks before the points were all posted and available to redeem.
Check your acct statement for the last few months and see if any points are pending. That might be the problem.[/QUOTE]

Ditto. I believe that often times points that involve merchant purchases appear as pending for awhile, possibly to ensure that you haven't returned the item or something. The Account Statement makes it pretty clear how many points are pending, so if thats the problem, you'll know.

MyPoints these days is of very little value to me -- I can get much more worthwhile points through something like AA's AAdvantage EShopping Portal. However, it doesn't hurt to click on those BonusPoints emails... I have them go to a GMail account I setup soley for MyPoints, and I check it about once every week or two (the emails, I believe, expire after something like a month). It takes awhile, but for only a few clicks a day, its still worth that little bit of time to me.