Uhm, sorry, that doesn't make any sense.
If you have to remember 11 edges, then you do 11 algorithms, which is odd, therefore, you have parity. If you solve 11 edges, then the last edge (originally which has to go to the buffer) is solved automatically. How can it be you have flipped edge, if you solved all 12 edges? Unless you mixed something up.
Besides that, the number of originally flipped edge has nothing to to with parity. Parity is only depends on how many times you ha to use an edge-insertion algorithm, which cause the side effect (i.e., swap two corners in OldPochmann). If you have flipped edges in the beginning, then you either solve it with two insertion algorithms (first bring it to the buffer, second put it back correctly), which does not change your parity - or you flip them after the solving of the remaining edges, using edge-flipping algorithms - but you can't count those algorithms as insertion algorithms (since it does not swap those two corners mentioned before!), therefore, your parity does not change.
If you have flipped edges at the end of the solve, but you didn't have them in the beginning, then obviously you did some insertions in a wrong way. But that is nothing to do with parity. If you have even number of insertion algorithms, then you don't have parity. If you have odd number of insertion algorithms, then you do have parity. Regardless of the number of flipped edges.