I just recently bought a bow and I have released about 300 arrows and right above my peep sight the string is starting to fray. I returned it to the pro shop and they said that the peep was not tied in properly and they repaired it by tieing additional string above my peep to stop the fraying. He said that I did not break any string and should have no problem from now on.

Should I be concerned about the repair and longevity of my string?

Thanks.