Mac OS10.5.8, DMW 8.0.2. Up until 2 days ago I was using DataAssist 2.0.6, but upgraded to 2.0.7.
I re-ran the DA wizard a couple of times to make sure I wasn't going wrong somewhere, but found basically the same problem. On the last run through however, I found on the Results page that clicking through to the Detail page worked ok and then the update/delete buttons on that page worked fine. Hope that helps identify the issue here - as I said earlier, this all worked fine before I upgraded the version of DA.