Some potential red flags? Thoughts?

This gentleman has a few interesting female friend cases that I find somewhat odd and he changed his story regarding one of them.

One of them was a married female that he met at a local gym and he stated she "pursued a friendship with me". The husband and her do not have much in common, so this gentleman and her will often do activities on the weekends. She tends to post more outings with this guy than her husband. I tried to look at things from the perspective, of if a married man approached me and pursued a friendship with me, it would seem a bit odd.

Two months before we started talking (we were friends on social media), he visited a chick out of town and made some posts. I had seen the posts and assumed he was dating someone new because of the photos and the comments from friends (hearts, etc.). When we started talking, he said this friend moved to Utah recently and plans to visit there often. However, during a previous discussion he mentioned this girl was just a friend who was dating someone, so it wasn't a big deal that he visited her. Later on, he changed his story and said, "Well she and I were both single at the time and I probably wouldn't have visited her if either one of us was dating someone. I'm very blunt, so I called him out on the change of story. He got mad and said my argument wasn't valid either way because we aren't officially dating. LOL