When you first put eggs in the incubator, it would be odd if the temps didn't go wacky. Your incubator is set at 100 degrees, more or less, and the temp of the egg can't be more than 75 tops.
General rule of thumb is to set the eggs and walk away, for at least 6 hours. If, when you return, the temps are still goofy, then you should adjust it.
The condensation would have built up on the windows because the temps went down, so that is also normal.