I suspect this may just be a cheap repackage, though I can't say for sure.
I think if ADV were to acquire the remainder of the series, there would be an announcement of some kind. I have not heard about them getting access to anything beyond what they initially had all along. The original deal for the series was between DiC and Toei, and ADV just got what DiC had. If ADV were to acquire more episodes, they'd have to go directly through Toei and we all know how stubborn Toei is when dealing with international licensees.