In what size cages do you have yours set up like that? I've got my new 6'x2.5'x1.5' set up with the probe cool side at 80* and the floor under the panel gets around 85*ish, maybe close to 90* when the panel is running at higher power but it seems to cycle fairly quickly. May try setting the probe warm side under the shelf at 85* or I have holes drilled for probes above the shelf, set them at 87* maybe?
Smallest enclosure is 36"x18"x15", largest is 96"x30"x18". I use proportional thermostats so there's no cycling involved, usually the RHP's are running 10-20% according to the thermostat.