Yes... the 2 files are from a single airing. And that single airing was edited into one complete movie. The guy who recorded it just missed the middle part and started to record the second movie late.

There's further reason to believe the scene where Tsurusennin manacing Pilaf was dubbed as linking footage between Legend of Shenlong/Curse of the Blood Rubies and Mystical Adventure.

There's a Latin American (I think) dub based upon Harmony Gold's dub (including leftover Harmony Gold foley and everything) that is almost identical to what exists of the Harmony Gold stuff. The scene with Pilaf and gang is in there, and the LA dub talks about Gurumes' defeat... something which isn't in the original (obviously). There is a complete copy of this LA dub that exists, along with the two above files.

From that, we know which scenes were cut completely and which are missing from the TV broadcast. The scene with Pilaf is one of those, along with a short scene of Bulma as well as the very very beginning of Legend of Shenlong.

I have the two files that exist. Hopefully what I'm trying to find is someone who lived around Philadelphia who may have recorded this and still has it or the other episodes. :)