"All three of these valves have had the signal line opened via a line and screw valve connected a tee fitting at the X port of the compensator valve when the pump was locked on demand to insure there wasn't pressure present, even though there was 0 pressure at the X port of the compensator valve the pump stayed on demand until the engine was shut off"
You have proven something is not right with the pump.
Cut your loses and aggravation and replace it.
Been there and done that, I'm too tired tonight (going to bed) to type out the long version, short version is the compensating valve provides pressure to a piston to overcome a spring and center the swashplate and take the pump "out of stroke".
If due to internal leaks the piston doesn't move when the compensating valve sends pressure/flow to it the pump will remain "in stroke" even though the compensating valve is providing a "destroke signal/flow of oil" yo the destroke cylinder in the pump..
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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