He said we didn't get a fair or strong ref, and feared the worst when he saw who it was.
Unfair doesn't necessarily mean he was intentionally favouring Chelsea. This soc often has a moan about the ref and calls decisions and referees unfair, but I doubt there are many of you that actually believe there's a deliberate conspiracy against you. Read into it what you will, there's probably an element of truth behind what you're saying, but it sets a bit of a dangerous precedent because i'm sure you could find implications of intentional bias in an awful lot of comments from managers and you'd have to start punishing them similarly severely.
No it doesn't, but given the context of the game and the decisions that went Chelsea's way that's what he was suggesting. The ban is as much driven by the FA feeling it has to be seen to act 'strongly', 5 games spent watching the game from a different angle isn't that severe. Even then the ban is only so long because it triggered a suspended ban from last season.