Hello Jim,
I'd recommend running the ACI WebUpdate so that you've got the new functions we've added in the last few months including a few addendum improvements; and if you still experience any addenda problem, to call us so that we can fix it with you.
We're open 8-8 Eastern, M-F; and you can call 800-274-8727 and we'd be happy to troubleshoot.
Andy @ ACI