So the formula, I take it, goes something like this:
If the Patriots lose 2 free agents, and sign 1, they receive 2 compensatory picks.
If the Patriots lose 1 free agent, and sign 5, the receive 4 compensatory picks.
Conversely, if Buffalo loses 10 free agents, and signs 1, they receive a 6th round compensatory pick.
If Buffalo loses 15 free agents, and signs none, they receive 0 picks as compensation.
It all makes sense...