Sooooo this is what happened!!
I have another thought.....
The reason this happened is the seal on the motor side somehow got stuck to the caulking on the slide, no idea why this would happen! So the motor side was stuck when I attempted to extend the slide not knowing it was stuck but then it broke free and the slide extended out.
So my question..... is it the motor side that jumped 3+ teeth (118.5 showing) when it broke free?
I'm now thinking the motor side is the side I need to adjust (push slide in) to match passive side. More I think about it the more sense it makes.
Passive side is showing 115 teeth.
What do you guys think??