The reason they mentionto wait and "permeate the plates" is, air bubbles can be trapped, and the seperator plates are porous, so the acid needs time to get in there. CHARGING before this time has passed, can, conceivably be bad for the plates. The vent, isn't so critical. You're fine.
Too much is just barely enough.....
2007 Tiger 1050
2005 Royal Star Tour DeLuxe
1973 Yamaha TX750 1984 Yamaha RZ350
1974 Norton 850 Commando Roadster