Export session not trimming source files

I have been wondering how to export (or even re-save) a session from other sources to and have the files convert over to the sample rate & .wav format I work in. I've tried every session export option, and nothing works 100%. Exporting to .sesx option - what does that even do? The file conversion works, but the session stays at the original sample rate and makes more copies of the files in a conformed files folder, to match the session.

The closest I came was exporting to .omf. It converted the files & session to my preferred sample rate, but I lost all effects & busses and all stereo files were converted to dual mono, and Left & Right channels were placed on separate tracks.

Audition 3, you could re-save the session at the sample rate you wanted, and all files were converted to that rate, and to .wav format. Easy-peasy.

Agreed - it doesn't save split clips as separate files, even if you ask it to, and alter the clip names. Intrigingly the session file retains the altered clip names - I was rather hoping that it would have saved the individual clips with these altered names, but no.

I haven't tried all the options yet. One thing that occurs to me is that the file I split and wanted to save was originally shown (in grey behind the options) as being an MP3 file - which it was. I don't know whether it would have made any difference if it was a wav file, but it might have. The reason is that in order to import it into the session at all it had to be converted to a wav, because that's what all the files in a session have to be. Splitting an actual MP3 file is something that Audition cannot do, of course, so it would have only been able to split the wav copy, and of course that isn't an original file... if I get time later I'll investigate further.