You should first be sure that the issue isn't fixed at 10.1 SP1, then check again with 10.2.0 (very soon).
It's a bit tedious, but the work-around is to whip up your own envelope-calculating extractor function.
Unfortunately, you really want to send this note to Tech Support.
Unfortunately as a EDN subscriber that doesn't look like it's an option for me. For some reason I can't find any way to submit bug reports.
"As an EDN subscriber, you have the option to add technical support to your EDN subscription. This support option gives you with a block of 10 technical support calls for any product included with EDN within the subscription period."