Hey i am a new owner of 2 baby bearded dragons (Cleo and Caesar) as of yesterday

and i just have a couple of queries... and any advice would be very much appreciated

First of all i want to know if it is hot enough for them/ if it isnt how to raise it....at the moment it is 80 F in the cool end and 90 F in the hot end, they seem happy with it but i could be wrong =/.
Also Cleo keeps coming up to the galss and just sits there? i have already fed them both (they had 1 cricket each but didnt eat the other 4 so i took them out), i have taken them both out but only for about 10 minutes as i didnt want them to get stressed, and they have also had water. i cant think what it could be unless she just likes to watch me.
things you might need to know;
* The substrate i use us Exo Terra Desert sand (neither of them eat the sand and they both like to bury in it and sleep at night which is really cute

) also thats what they had in the pet store so they are used to it from a very young age
* I use a 100w Basking spot lamp with a thermostat set to 95 F and a heat mat at night but they didnt need (well i dont think they do it was;
80 F at 11:15 pm in the hot end and 73 F in the cool end
80 F at 12 pm in the hot end and 72 F in the cool end
73 F at 12:40 in the hot end and 72 F in the cool end
70 F at 2:15 in the hot end and 70 F in the cool end
it so i switch it off at about 11pm after i came home and realised it was pretty hot (i was told as long as it was between 60 F and 80 F it would be fine, and seeming it was dead on 80 i didnt want it to get hotter when i was out the room/ sleeping)
*I feed them crickets with Nutrobal (calcium powder) and also leave cut up lettuce in there which i replace 2 times a day.
Thats all i can really think of at the moment if there are anymore questions please ask and i will be more than happy to answer them to the best of my ability
Thanks in advance