Those lig pops aren't usually a problem unless you experienced pain with it. You are fine. I'm sure others will chime in on this.
its true i always get lig pops when doing rotary stretches downward i dont think they really matter as long as u feel comftroble with no pain and sstill are able to feel a good stretch thru ur penis and deep into your ligs its also good to do research about the penis to really understand what you are dealing with and also avoid injuries