13.2 is a bit low but you also have to take the meter into account (13.2 might really be 14 volts)
Seriously I would give it a bit of time to charge before I hollered.
SOME smart chargers (I do not know about the WFCO) will sense very low batteries and adjust so they start them back up slow.. My Progressive Dynamics 9180 with wizard is not so sensitive, It will kick into bulk mode and do it's best to bring 'em up fast. (Providing the circuit breaker holds, at that kind of current draw it has been known to trip those)