Why is your coolant leaking from the top of the tank if the tank is to the line and why is it not going down?

Perhaps the coolant was overfilled. It will expand because of heat or pressure and the excess makes it way to the coolant refill tank. Make sure your coolant doesn't have oil in it. In a worst case scenario you could have a faulty head gasket or engine damage that allows engine oil to seep into the coolant. But if you don't see oil in the coolant, then just drain some off.