Hi AynaDee,
I just got the same DVD. They spend a lot of time stopping to take their heart rate on it, don't they?
I found that getting mine isn't exactly easy, and I don't trust the results I've been getting. The beat "disappears" on me, and I have trouble coordinating my counts with the actual beats. Obviously I need more practice.
Is it possible you haven't been getting an accurate count too? I think this whole procedure is tricky enough that it would be easy to get it wrong....