Seems that when I try to rollback an area in a radius of say 10, it does it for the entire vertical chunk.
Kind of is an issue when 1.17+ allows for up to 4096 in world height and a lot of maps (mine included) are very vertical

Not sure if this is intended or not but

Using CoreProtect: 20.1

This is intentional behaviour. You can use r:0x0x0 (x/y/z) for specifying a vertical radius.