I have in my possession right now DVE and Sound & Vision home theatre tune up (a few of us at work consolidated our home theatre set up wares into a kit) I used the S&V first and then tried the DVE, all the seperate speakers were exactly the same except the sub and it was suggesting I lower the sub 10db. So, I would recommend the cheaper S&V (around $15). S&V gave the same results (at least with my arrangement) from an individual speaker perspective and is also so much more user friendly.

I checked DVE's website but did not see the error you said was documented, maybe you can point me to the webpage, I would be interested in reading what they say about this and also thanks for the heads up on this!