I can't download my past purchases with my Apple ID

I keep getting the message below and I'm not sure why. I haven't used a different Apple ID using my computer login and my iTunes Library. This is pretty annoying as I just want to be able to dowload purchases I made with my iPhone on my Mac. I called AppleCare and even Chatted on the web. The solution was to remove the 14 day block which they say they did, but I'm still getting the same message hours later. I'm hoping this will clear up soon.

This computer is already associated with an Apple ID.

You can download past purchases on this computer with just one Apple ID every 90 days. This computer can be used with a different Apple ID in 14 days.

I've updated to Mavericks and Anyone else having this same problem?