Your terminology is OK. Serving is what it is.

There are a couple of things that cause serving to separate. One might be that the string wasn't under tension when served or the serving wasn't tight enough. If the string wasn't under enough tension then it will creep (elongate) when put under the stress of the bow. In either case you'll find it quite common (not normal) for it to separate where it rolls over the sharpest part of the module. This especailly true for single cam bows.

I've seen and had lots of strings have their serving separate at the module and it can be pretty bad at times. It's usually due to serving compressing and slipping, usually in the direction ofthe end loop. All string do creep, but not so much as the separation would indicate. I've seen serving separate over an inch and am here to tell you that no string creeps an inch or more in that short of a distance---what?, maybe 6"? Ain't happening.

I've heard pretty good reviews about Bowtech strings so won't bash them. Maybe you just got one of ones that wasn't quite up to snuff. What I would do is try having it reserved by someone who knows what they are doing. The cost shouldn't be that bad. If that doesn't work or suit yuou then a good set of Gibblet strings should definitely do the trick. I've had good luck with Winner's Choice, too, but Gibblet makes just as good a string at nearly half the cost.