In Act II there is a Campaign Achievement called "Judge of Character" with 36 checkboxes, one of which is "Orders from Maghda" again. All my research indicates that this is only found in Act I, and I already have that checked off. And after walking through ACT II several times I can find no "Orders from Maghda" anywhere.
There are two Forum topics that speak to this:
This has all the signs of a bug in the system.
Can someone help us out?