I can't speak to any particular referees, match, etc. I've never refereed a wrestling match. But I did used to umpire baseball games (HS and college), so I have some insight as to possibilities.
Often times officials working together don't know each other or at least haven't worked with each other a lot. Add to that differences in personalities and you can get an interesting mix when a decision needs to be reviewed/potentially changed.
-One official may have a more dominant personality, therefore dominate such conversations or the 2nd might be a little hesitant to offer a dissenting opinion.
- One official may be completely sure of him/herself (even when they shoudn't be) and not open minded to overturning a call, believing they are right.
- The fact the conversations are had in close proximity to those competing and people can read lips/hear would by nature keep the conversations short. That in itself could limit discussion.
- A Senior Official paired with a newer official at that level could add to the above.
None of that is an excuse, just a look into possible interpersonal dynamics that could cloud a situation.
I had a situation in baseball where the home plate umpire I was working with messed up a call. After getting yelled at by the home coach, he came out to me and asked me. I was honest and told him what I thought but added that I was way too far away and didn't have the angle to say so 100%. He then turned around and changed the call, hanging me out to dry. The visiting coach then came out and screamed in my face for 5 minutes while the home plate umpire sauntered back to the plate and let it happen. I was so pissed. I chose to never work with him again, when I could help it. But in baseball, you don't always know who you're working with until you show up for the game. Anyway, I'm rambling now. Just a thought or two....