Yeah that's the worst, it's obviously not your fault. The mom may have not wanted it but at least don't make such a fuss about it.
Not Navi but I know on our trip last month we rode the Safari and they squished 5 adults in the front row. The poor girl to my right (she was in the middle) couldn't really see anything and we were playing gymnastics with our bodies since our shoulders and all sorta could fit in all together. I found out later on from my CM friend that they should not have loaded it like that. We were a party of two, they were a party of three. I thought when we were there that there's no way this would be normal for the front row, and I found out I was right.