Virtual track issues DP 24

[Rickey Mifflin]

Having an issue with the virtual tracks feature on my DP24.I record the original track,shows as virtual track 1. Next I create the virtual track 2,load it and record an alternate take. Problem is that the virtual track 1 is recorded to virtual track 2 along with the alternative take 2. Also.I am using 2 mics in a mid/side configuration,recording 3 tracks at once ---mic 1-left side--mic 2 center and mic 1 right side. So I try again, I clear the 1st track,and record over it,or so I thought. I suddenly have a 3rd track identical to the first track Never had this happen before, where am I screwing up?