[RiceIntegraRS]

So the other night me, my buddies and another group of people were having drinks at a Restuarant/Bar. Near the end of the night the group of people left cause it was late for them. Apparently they settled there part of the bill when they left, so when we got the bill at the end of our night. It was alot higher than expected(It was 1 bill for the whole table). Anyways we called the group and they said they paid $150 for there share. Apparently the waitresses forgot to minus it from bill that we got. Does this happen often?

I remember times that this would happen alot when couples or friends would leave early cause of work in the morning and sometimes me and my friends would be too drunk to realise this and basically double pay. Isnt it the waitresses responsibility to adjust the bill accordingly?