It is a listing error - it is definitely a 3 disc set (1 CD, 1 DVD, 1 DVD-A) - the 3rd (unlisted) disc being the DVD-A which are the last 10 tracks listed.
As far as the quality of the DVD-A, I'm finding it very good (and very pleasing). Both the surround mix and the re-mastering are top notch IMO. I've never heard Skynyrd so clear and clean. To me, the bottom end is tighter and deeper and the top end is crisp and clear but not bright. Ronnie's vocals are as good as I've heard them.
As mentioned, you can turn this baby up and enjoy it at high volume without it sounding like a compressed piece of doo-doo. The surround mix is quite good - not too aggressive but enough to make it noticeable and interesting. I think it works well because the band has multiple members and guitars so it's "realistic" to hear guitars and other instruments in multiple locations.
My first impression standouts are Gimme Back My Bullets (the vocals and surround mix are very nice), Simple Man (the bottom end is really solid on this track as are the vocals), The Ballad of Curtis Loew (while it doesn't lend itself to a great surround mix, the vocals and instruments are crystal clear), Saturday Night Special (another nice surround mix), and All I Can Do Is Write About It (again, not a great song for surround treatment, but it's crystal clear).
I've got all of their older stuff on vinyl (pretty much the only way I've listened to them until now, with the exception of the odd spin of a couple of gold CDs which are IMO just okay). I may just reach for this DVD-A most often now when I want to hear some Skynyrd - that's saying a lot because I love to spin my vinyl and find it hard to beat for a lot of the 60s-70s-80s music I enjoy!
So, to sum up my first impression ....it's by far the best 12 bucks I've spent in a while.