Moose...if he was actually a route taxi on his correct route (West End) as defined on the side of the vehicle...you should have given the route fare of 130j and rightfully expected change back from your $5us.
As someone living here...I would have known he was a West End route taxi and laughed and asked for my change.
If I had seen that it wasn't a West End route taxi...I would have known I was chartering and negotiated before I got into the vehicle.

These are some of the things that start to happen when you're using a system designed essentially for locals. If you've grown up with this system or use it regularly as someone living here it becomes second nature...but route vs charter can get very confusing for all parties involved including the taxi driver, as most expect that a foreigner is wanting an exclusive chartered taxi ride.

And, to add to the confusion...if that driver who picked you up was actually not on his route...it is illegal for him to act as a route taxi and would assume that you were chartering, as this is the only way he would be a legal taxi driver on someone else's route.

This is one of the reasons Rob recommends chartering a taxi rather than using a route...it can seem like a simple system but there is actually a learning curve...and not everyone should spend their vacation time having to figure it out!