This goes back to Wally pulling the same crap on Cameron Wake. The key here is there an addendum in the CBA that teams either ignore or don't get players to sign. It specifically explains the extra option year to a contract. It virtually tells a player that a one year is a one and an option , 2 year is 2 years an an additional year. It too can be cause for voiding a contract.
The other issue is in the NFL agents and players have to sign a contract. There was talk of including this in the last CBA of the CFL but I am not sure how or why it was not included. It may come up again.