DISHWASHER IS ONLY FILLING WITH A SMALL AMOUNT OF WATER

Possibly food blockage. You can try shooting some air under pressure into the fill hole to blow it free. A simple shop vac on "blow" may be enough if you do not have a small compressor. Other possibility is the exhaust going into the garbage disposal is blocked so that the water cannot exhaust and any amount added floods the unit. (first item is most likely).
Jim

Good Morning Kristen - You may try to reset the dishwasher by unplugging it or flipping the household circuit breaker off. Wait approximately ten minutes and turn the dishwasher back on. If this proves to be ineffective, then the unit may possibly being experiencing a communication issue with the control panel, wiring failure, drain motor/pump or water valve. Because it could be a number of any one of several underlying causes, I would recommend contacting a professional to properly diagnose and repair the unit.

You are correct. The inlet water valve is leaking. It might be worn or have debris stuck in it. There is a very small chance that the electrical signal from the controller is letting a small amount of current in and holding it open. To rule out this problem you can uplug the machine and see if it stops filling. Otherwise just replace the valve. IT is not hard to do.

You have to wash it with plain water only. Try from the front and remove water using a small cup. Or use sponge and squeeze the water.

This is the only way!

YES IT IS WATER FROM DRAIN HOSE LEFT AFTER PUMPING OUT THE MAJORITY OF WATER AND IS LEFT IN HOSE.

The fill cycle is a set time and not measured. Either your water pressure is low at the dishwasher or the screen on the fill valve is partially blocked keeping the correct amount of water from entering during the fill cycle.
Eric

Most dishwashers leave a small amount of water in the bottom to keep the seals lubricated. If it is only a small amount of water it should be normal.

A small amount of water may be normal.  Clean the filter at the bottom of the tub.  Sprinkle some baking soda inside between washes.

it's prabably your pump it has two metal strips that snap on from the motor to the pump un-snap them and undo your hoses and get yourself a new pump

From what you are describing, the fill valve may have failed or become clogged. Start the dishwasher, when the water stops filling, open the door and check the water level. There should be at least an inch to an inch of water in the center of the tub. If not, replace the water inlet valve.

If you need further assistance, let me know with a model number
Regards,
reg501