You have something called 'CasperSuite' in your login items?
If you don't use it, remove it. That should take care of the 'jamf' problem on bootup.
My MBP is currently at 64C, I'm not running much, just mail and safari. I really don't think you've got anything to worry about at 50C. If your temp starts climbing to 70C and the fans are noisy, then you need to start looking at what's going on.
EDIT: This might also settle you mind a bit: