Oh right - Apparently the checksum is incorrect and it needs to be fixed? I haven't worked on this in a while in any case, haven't been receiving help with porting the assets over to S2 8-bit, so I don't know what to do.
There is a feature-complete editor out there for use called STH1ED I think is what its called? You do need some hex tweaks. Once I come back to this I will probably switch to the Sonic 2 8-bit engine, we'll see.
