AUDIOSNAP AND TEMPO

HI, i wonder if anyone can enlighten me on audiosnap's tempo changes. I know how to change tempo to match an audio clip, but could anyone explain to me why it doesnt alter the tempo so that is regular throughout the track? I know why it does it, due to transients being different lengths etc, but I always assumed that (so long as it was a regular type of track) that the tempo should always be the same. As an example, if i match tempo to an audio clip, then play it with, say, a regular session drummer, simple drum track, when you listen to it, the drums speed up and slow down. Surely this is not what a regular tempo should be?
I've spent hours trying to get my head around audiosnap, but this part of it just does my nut in. Can anyone tell me why they have designed it this way? All I want is regular tempo to match my audio.
Cheers, John.

Thankyou for your reply. At least i'm not the only one then. I've looked at forums and tutorials and videos, yet i haven't seen (what i would imagine would be a glaring problem, however it could very well be me that's the glaring problem!)this featured. Can anyone else throw any light on this please? If only to preserve my sanity!

I thought I gave you the answer, what other info are you looking for? 
There's nothing more to it, you sound like you understand how it works and found out like all of us that it is flawed. 

Try to record all further projects using some sort of click or better yet a basic drum track, if there are going to be drums in a final mix all recordings must start there. 

Build yourself a collection of templates that have a few different drum patterns that work for your style of music,,, even if it's only a hi hat. 
I have mine divided into midi tracks for each drum part, Kick, snare and hi hat. so I can then rebuild a full drum track latter on. 

Well I don't think it's possible for anyone to play in perfect time. Sure , we can be so close but never to the clock,s resolution. 

And that brings up to topic of not worrying about it. If you can't "hear" timing imperfections then all is good. 

I don't use the clock when recording pure audio music as in my bluegrass band, which has no drums, or our live band with drums.That makes for the best recordings that sound natural. 

But if I'm going to be the one all by myself building a song with midi parts then it will have to start with a clock pulse. Otherwise it will slowly build into a mushy mess of timing.  I find that even two musicians playing together will have better timing than one.