Get that acurite thermometer and put it IN the tank on the wall near the floor of the coldside. Attach it with some 3M sticky squares which you can get at any home and garden chain store. I find everything at lowes personally. Anyway, mount the thermometer there and run the probe over to where the UTH is and put it IN the substrate above the UTH. Then you'll have both cool and hot side readings. I tinfoiled the top of my terrarium to keep humidity in and am also using terrarium moss. Keeps the humidity up in the 60s all day WITH a lamp over the cool side(its cold here lol). I'm still working the kinks out with mine too, got a lot of help from people on this forum and once my hides from reptile basics finally show up I should be good to go.

As for regulation, you really should have at LEAST a dimmer on a UTH/lamp but I'm running a basic on/off tstat for the UTH and a dimmer for the light.