I was having the same problems with both my Guardian and Commander bows as a few of the other members. Thought I might share what I did to resolve the issue I was having with my Guradian and Commander bows.
I kept having my control cables served ends separating in the same area time and time again. I reserved the ends and also replaced the control cables and still had the same problems. The last time I replaced the cables, I took the modules off and looked them over very well. I found that all four of the modules, both on the Guardian and both on the Commander, had what I"ll refer to as a "peak" spot in the grove where the control cable goes. The following pictures show what was happening to my control cables and where it was happening.
I took a small round file, about 1/8th inch and filed down the "peak" point to match the radius of the rest of the grove. I then took some emery cloth and polished it up good. The last picture, with the yellow highlights, illustrates kind of what I"m talking about. Make sure you file down the peak in the grove and not the outside lips that hold the cable in place! I put on new cables and so far so good. No separation at all. Bowtech might want to take a look into this, as I have talked to a number of Guardian owners with the same issue.