Reconcile to GL

Hi! Im confused while trying to reconcile to GL. Here is what is happening.

I am using Financial > Routines> Reconcile to GL (Payables)

When I run this from 02/01/13 to 02/28/13 my "Total PM Ending Balance" is 326,679.59.

Then I go and run this from 03/01/13 to 03/31/13 and my "Total PM Beginning Balance" is 349,079.45.

Shouldn't my ending balance from 02/28/13 be the same as my begining balance from 03/01/13?

Thank you,

Jackie