Hi (again) Chimera Team!

Encountered a problem where chimera seems to fail to open PDBs that it created.

I saved multiple PDBs to a single file as I wanted to open them and have them behave like a single structure.

I started a new session with another PDB open that I want to compare the multiple PDBs to, went to open the multiple PDBs from before that I saved as a single file and nothing appears. Chimera claims to have opened the files successfully and I get no errors etc.

Am I maybe misunderstanding the point/use of the multiPDB file form?