She shouldn't interfere with your parenting, but you also need to accept that she has less time and needs to be more flexible when dealing with many children from different families who all have different priorities. It can be impossible to remember exactly what family X, family Y and family Z find the most important in good manners.
In the long run, it's going to be your manners and not the keyworker's that rub off on your dd, so take heart; as long as your own example is immaculate, the rest probably doesn't matter that much.
But I agree with the others, she sounds a bit lazy, and she has no right to interfere with what you do.