Yes, that has to be a misprint. There are 32 shorts remaining (16 Shemp, 16 Besser), with a total running time of 516 minutes, pretty evenly split between the two groups. (It's easy to calculate when you have access to the database.) 
I'm not up on the technology - would those fit on two DVDs, or will they have to go to three? Either way, I'm anxious to get them and complete the set. 
Ah, my expertise! Let me give my lecture.
A DVD can be single-layer or dual layer. Single layer has one layer of data and holds about 4.35 GB of data. Now, I know all the sources say 4.7 GB, but whenever I burn DVDs, I'm only limited to 4.35 GB. Maybe manufactured DVDs (which are pressed, not burned) are little better and can hold 4.7 GB. I honestly don't know.
Now, Dual-layer has two layers of data and holds
about 8.7 GB of data.
So, how much video can you fit on a DVD? Well, if you want good quality video, it's best to not exceed 2 hours per layer. Sony has been using dual-layered discs on these chronological sets; they've used single layer on the old themed discs, hence the 5-6 shorts per DVD. So, you can fit about 4 hours of video on a dual-layered discs. That's about 12 shorts. You'll go a little over 4 hours if you add a 13th short. So, Sony kind of cheated on a few of the chronological sets, since a few had 13 shorts on a disc. BUT, thankfully, the added compression didn't really show, so they probably did a good job encoding the videos.
So, assuming Volume 8 will have 32 shorts, you'll have to cram 16 shorts on each DVD if they still want this set to be two discs. Not good! That will be a lot of compression and will look quite ugly. So, I think Sony should make this set into three discs. Two on slim case# 1 and the other on slim case# 2. That way, the quality is good and the size of the set is the same as the previous 7.
