And, if I may ask, why do you have both the 18-55 and 18-135? I've been wondering a while.
The 18-55 STM came as the kit lens on my SL1. I keep thinking I might use it one day when I don't feel like carrying the extra weight of the 18-135 STM. I can't see myself getting rid of it because it is not worth much but it is still a very nice lens. So it sits on the shelf most of the time. (along with a bunch of other rarely used lenses)