Why can only ONE Apple ID be associated with a computer every 90 days?
We have 3 family members who all sync our iPhones/iPads/iPods to the same computer. My son can't access and download past purchases from his iTunes acct to our computer, because it says ONLY ONE Apple ID can be associated with the computer every 90 days, and I just downloaded a movie this week from my own account. Now, my son has to wait 90 days to access his own purchases. I feel I should have access to my purchases any time I want, as should my son and any other family members who use this computer. The number of devices authorized to access iTunes Store purchases is already set to five (which we do not exceed) so, why this additional restriction? I don't understand why Apple would restrict me from accessing our own purchases.
iMac, OS X Mavericks (10.9)