Wheelchair vs Walker

So yesterday my sis and I were heading on the bus to do some shopping she had her double stroller with a 3month old and a 22 month old. we got on and there was a lady and a man beside her with a walker. Another lady had a 6month old in a single stroller and we just fit with her so the lady started talking to my sister about having to move her stroller down the aisle and when we refused she pointed to a sign that explained in the event that the bus was busy strollers should be folded and moved from the aisle. I said "that the bus wasn't crowded and that if she moved her walker over we could fit easier and that we would move around when we got to the next transfer site... she immediately became hostile and said the she deserved to have her walker with her and that is didn't have to move anywhere and that she wasn't going to move it...
When we got to the next station i noticed a wheelchair waiting to board and moved the other stroller and my sisters over so that there was more than enough space for passengers to board and the lady then refused to cooperate with us and wouldn't remove her walker so the wheelchair passenger could board. Mobility Plus bus is available for wheelchair passengers but must be arranged 2 days in advance. So the boy in the wheelchair was forced to wait 1/2 hr for the next bus, because the driver was not going to argue with the stubborn lady...
So in this round the lady wins but i will be calling the costumer service and asking them to change the policy on walkers. They should be folded and or moved so that the wheelchair could of fit.
Another side note is if you have bags and want an extra seat pay for one or let moms with newborns in slings sit down...