Why do some PX games save/extract maps automatically to Team17\Worms Armageddon\User\SavedLevels ?

Can we keep PX discussion limited to a single topic? I think this is it: http://forum.team17.co.uk/showthread.php?t=47942

I didn't know it all has to go to one thread. Thought PX is recognized widely by now and separate threads can be created for different issues. I'll go there then. Thanks for the info.