It doesn't appear to be serving wear so much as serving separation. Excuse me, but this is not normal no matter how old the string is. It's simply a sign of piss-poor strings in the first place.

Just from the color (black) I would assume you got them or had them put on at a local shop.I'll bet they are Tailor-Maid. OK, it's not normal, but quite common. It's not nice to say but the old cliche "you get what you pay for" might fit right here. Also there doesn't appear to be many twists in them ( alittle hard to tell). Good strings will have about 1 twist for each 1 1/2" of string.

My advice would be to write it off to experience and start looking at decent aftermarket strings. These usually cost a little more, in some cases a lot more. Right here on this board there's a guy with the user name of Gibblet. If you order from him you can be assured of quality, prestretched strings. You get to pick the color and material you'd like (BCY 8125 or 452X). They are prestretched and twisted, then served under tension. The end result is no peep rotation and certainly no serving separation such as you are seeing. If there is ever a problem you can call John and he'll take care of it.

Another advantage of good strings is that they will initially creep (stretch) about 1/8" to 1/4" during the first 50 shots and then never change until you decide to replace them. This means once your bow is set up and tuned it will stay that way.

Depending on which string maker you choose, expect to pay about $55 to $100 (Winner's Choice) per set. Most all good makers will guarantee no serving separation for at least a year.

Sorry to sound so blunt, but I get a little miffed at some of the garbage pushed on consumers.