I have a Maytag Neptune Model #MAH5500BWW, and it leaks water only while it's filling. It's almost like it would rather fill my floor than the tub. When I start a spin only cycle to get the water out of the tub, there is no leak. I've checked all of the house, and the water is not coming from you back. It's at the bottom. What could that be?

There are a number of places where the water leaks out. There should be a plate in the back that you can remove. Then put the machine into the fill position and look with a flash light. You should be able to find the leak that way. There are several hoses above the drum; any one of these could be leaking

Sounds like a leak either in the bottom, connector or water valve for your water inlet line. Visually finding the leak is your best bet, then you know what parts are to be replaced.