Several times over last few days have noticed my BP coiled in water dish, is this normal or possibly a temp issue?

temps are:
under hot side hide(above UTH controlled with Johnson thermostat) 90
under cool side hide:79
ambient:79
humidity:57%

the water bowl is located in center of tank under infer-red heat lamp positioned about 8" above tank plugged into dimmer cord on about 1/2 power.

http://i160.photobucket.com/albums/t...x/100_0168.jpg

http://i160.photobucket.com/albums/t...x/100_0169.jpg