sure. he may have been stable at this point. maybe he started acting strange over the last season, and the bills made a decision to keep him at a price they felt was worth it for him, and let richie make the decision, which he did, (i'm obviously speculating here). who knows what really happened. i just don't put anything richie does on the bills. he's proven many, many times that his problems aren't bills related.
i think the zay jones thing has been over blown by fans, unless he's had a history of doing this. he may have taken something strange and reacted. as his luck would have it, he was recorded.