LIME Random Forest explanations:
I think the answer mostly lies in the fact that these are just approximations and they're not super exact because of the small data set and nature of decision trees. The prediction was really 1.0 (I'm guessing all trees' leaves agreed entirely on the prediction). 

If gill_size != broad, it would still be 1.0, you could say (1.13 is meaningless). But maybe if gill_size != broad and odor != foul you could expect the probability to be about 1.0 + 0.13 - 0.26 = 0.87. 

A little more explanation is at https://marcotcr.github.io/lime/tutorials/Tutorial%20-%20continuous%20and%20categorical%20features.html