Mixed formula bottle wrong

Last night my daughter woke up for her night time feeding and I use a formula dispenser that I keep next to my bed. This morning when I woke up I realized it still had some formula in it. I measured the formula and it still had about a scoop and a half. She drinks 7oz bottles which means this bottle only had 2 scoops of formula. I’m worried about water intoxication. Has anyone else ever done this?

FTM