I would like to suggest an extra "is the PC already mounted?" check before letting PCs mount horses.
I managed to duplicate Alleina's horse (no clue why, it just happened when I was renaming it) and noticed that it was possible to mount the "clone" when already being mounted on the other horse. Due to natural curiosity, I tried that of course, which resulted in that the phenotype of the character kind of messing up (one's still on the horse even after dismounting it which makes one able to "spawn" a lot of horses).
