Question about PWM and reading it on an analog IN

Hey all, I have a question here that has me scratching my head a bit. Hopefully someone can help. I have two Arduinos connected. They are connected by two pins on each arduino. The one outputing is sending on Digital outs...6 & 7 I believe. The other one is input and is recieving on analogINs 4 & 5 I believe.
I have the exact same programming for both analog ins and the same programming for both digital outs.
Crazy thing is, I am getting terribly different results from the analog INs. I think one of the Digital pins is a PWM pin by nature. Does this mean, if i write that pin to a HIGH state that it will exhibit some sort of a PWM feature that could be picked up on the analog INS as intermittent LOW readings?
Basically the question is -- how do i program a PWM pin to act as a regular old Digital Write HIGH pin. Do I need to disengage the PWM feature on the chip? or perhaps do I need to use the analogWrite(255) to juice it up to full voltage without getting any dropouts from the PWMs?
Any help would be appreciated.
Thanks
arduiYES

how do i program a PWM pin to act as a regular old Digital Write HIGH pin

pinMode (PWMpin, OUTPUT);
digitalWrite (PWMpin, HIGH);

They are connected by two pins on each arduino.

Hopefully, the third of the two pins is the ground.

...6 & 7 I believe.

Belief may work for religion, but not here, I'm afraid.