The title pretty much explains it - on MAP02, there is clearly a player 1 start; however, after completing MAP01, ZDoom returns that MAP02 doesn't have a Player 1 start.
I can play the map fine through Doom Builder's testing function, and by putting NextMap into ZDoom's console, but beating the map before doesn't work at all.
It's definitely going to the right map, too. The MAPINFO lump directs MAP01's completion to MAP02.
Anybody have an idea?
Here's the WAD, in case you need it:
http://host-a.net/Phlum/ganymede-invasion-new.wad
The password for the file is zdoomftw
It's a 13MB download and I don't know why.

Cheers,
~phlum