[Amonchakad]

I'm having an odd problem with the llamaserver files. For some reason the turn file I receive is shown as a .zip file: in the mail it's called nation_name.trn, but when I try to save it it actually changes to nation_name_trn.zip, and it's effectively a compressed file which contains the .trn.
Is this normal?(I haven't used the llamaserver for some months) Or it's something with my pc? I use gmail, got windows 7, and the attached file gets opened with WinRAR. Could any of these things be causing the problem?