Temps seems okay. Humidity a tad low but not bad. Could you please give more information on your setup besides just temps. Hides? Tank or tub? Size? Is it a baby?
If the snake is just crawling along the wall and just falls usually this will not injure them. Unless there is somewhere high to fall off of. It could also be stress related roaming and trying to escape if it does not feel secure and safe. Most ball pythons tend to just stay in their hide when happy.