Sighted my bow in, earlier.....then all of a sudden I noticed the peep had spun out of place. OK....it's a new string....I twist it back. It's gonna settle in, eventually.

Well....the next few arrows are all low and right. I notice the D-loop is loose. I can turn it fairly easily. I don't think it's creeped up and down....but it will spin on the serving.

What (technically) just happened? Everything was great!