Wierd behaviour

I have had my redfoot for only two weeks and the temperature/humidity etc is all constant for the past week and a bit and here is what happened:

she finished playing and eating yesterday and went and burrowed herself in the COLD part of the tank just before the automatic lights went out and the night light came on. I thought it may be too cold for her in that corner so I picked her up and placed her under the night light (Infra Red, 100W). she sat there for a minute and then crawled back to the same corner of the tank (Coldest corner). that was last night. Its been 24 hours and she hasnt moved from there. I was out all day since the morning and thought she would come out later in the day but I know she didnt because my sister was in and out of the house and said she hadnt moved. Is this normal? Its Winter here right now and the COLD part of her habitat is about 70F

Right now its the night schedule (night light) I picked her up and moved her under the red light (which is close to the water etc) and she moved over and is drinking water. I have noticed that atleast 75% of the time, she will not move from where she is till I pick her up and put her near the food/water, in which case she WILL eat and soak in the water and drink for a while.... confused. I thought I would leave her alone today and she didnt move for over 24 hrs from the cold spot of the enclosure which I find very odd..