the .1 logs should (although it sounds like they aren't) merge with the full channel log (same name but without the .1 extension) when you leave the channel or when a new day's log is started (if you log on a day by day basis).

I thought I'd seen a script that would check if the .1 log had been incorporated, but not deleted (as might be the case if your computer shut down unexpectedly), however, I'm sorry to say that I haven't been able to find it. If another helper knows of the script to which I'm referring (or similar) and would post the link or script, it would be appreciated.