Time Stretch

How does the tempo work on time stretch? The way im counting tempo and the way the MPC does it is way different. When i use a sample and say i want to speed it up. I use the MPC time stretch to find the original tempo and its way higher than i think it is. If i were to record a 2 bar loop into a sequence i would make the tempo about 92 for the sample im using. If i run the same sample through time stretch it says the original tempo is like 120. Any tips on how to read the tempo correctly in time stretch?

I think the Detect BPM assumes the sample is always 1 bar and trimmed to the correct start/end points, so it might be off by a multiple of 2 +/- a bit. It's also mentioned in the manual.

Thanks i'll check it out