I'm pretty sure that the first one [ CPU 35] is your current temp. the second one is possibly MBM keeping track of the highest temp that you've had that day. The Case temp is the temp that MBM is saying that the inside of your case is at, although your case temp of 51 is impossible unless you have a furnace in there.
By the way, what I've said is if it is in Celsius. If your case is reading in Farenheit, then that's not a bad case temp.