Got a Thermostat! But...?

[Fae]

So I got a Vivarium Electronics VE-200 for the heatpad and set it to be 91, but now.. oddly enough when I point my IR Gun into the hide, its colder than my cold hide?
I have the probe buried beneath the substrate inside the tank since I couldn't put it in between my UTH, its in in a way where it can't be moved much unless she digs straight to the bottom, and even then its snug enough to stay onto the ground no matter what. It's about 1 inch depth of new cypress mulch, to which I replaced/put the probe in earlier today, about 6 hours ago.
Though, shes sitting in the cold hide and I can't get a good direct hit down into the substrate, but regardless the ambient temps in the "warm" hide is slightly lower than on my cold end now?

I did end up buying another hide that is the same exact hide as the one on the cold side now, but since it has two entrances, maybe the ventilation is off and I should set it higher..?
I'm not sure whats going on with my temps anymore to be honest lol, tonight I'm going to try keeping alum foil over the tank to see if itll better trap the heat in, since now the temps are starting to dip into the 70-74s even though I have a blue light.