Sometimes riders level up before the horses assigned to them, so the rider doesn't get reassigned new horses until it is his/her "turn" in the rotation. Some of your level 2 riders might still have level 1 horses under them.
Okay so lots of people have replied about wearing the soaked sock in boots tell they dry and I have finally got the chance to try it. It was a major success and I was rather surprised by the outcome. I do recommend drying your feet afterwards because no foot fungus for me nuh uh, no thank you! Any who, thanks for the feed back everyone glad I found something that could work for me from all of your suggestions :)