I received my herpstat 6 in the mail Thursday and what I've been noticing since I've set it up is that the temp is varying a few degrees. If I have it set for 92 sometimes it will dip down to 90 or up to 94. Is this normal? I have them all set to heat(dimming) but with the temp variation it seems like its acting like an on/off. What would you consider to hot of a temp? I want to set the high temp alarm but not sure what the max temp you all think would be the max someone should go before being notified.