Do you have the Big Boy Isolator and BIRD controller? If so, it sounds like the BIRD is not functioning properly.
It looks like this:
Are you seeing over 13.3 volts on the House Batteries while plugged into shore power? If charging voltage is lower than 13.3V the BIRD will not switch over to charge the Chassis batteries.
From the BIRD manual:
Regarding the White Wires, I have white wires on my battery negative terminal. I hate unmarked wires that are not color coded with the standard black/red for battery connections. I don't know where my white wires go. When I removed my batteries for cleaning I took a photo of the connections first then marked all the wires, and then I put "red" heat-shrink wrap on the positive connections.
If the guy changing the batteries hooked those wires up wrong (should have went to positive terminal) and they had something to do with charging, I think you would have blown a fuse as soon as the power on those wires went to ground.