First, glad your enjoying the app and everything is working well! Both issues are easily fixed. The first exists because if the slider range is to wide the slider loses it’s usefulness (jumps instead of increment by 1 etc).
The second issue is a bug and I will get it fixed very soon.
Update: I never asked but would do you think would be a better max range for run-once?
Update 2: The second bug should be fixed now.