Which episodes are in what seasons for GI Joe: A Real American Hero?

The seasons of GI Joe: A Real American Hero are currently discounted on the Apple TV Store. However, the way that they're listed is impossible to sort what's in what.

At the top of the listing, the Season dropdown shows Seasons 1 through 4.

In the Buy Seasons dialog box, only Seasons 3 and 4 are listed.

Season 3 further denotes that there are 4 versions. Clicking into that shows entries for Vol. 2 through Vol. 5.

Is there anyway to know what each purchase option actually equates to?