on right click on armor stand:
make player execute command "/examplecommand"
or: https://pastebin.com/M7AmnSZn
the command will be used two times, not just once.
Using 1.10.2 and Skript 2.2-dev30
Sounds like old main/off hand bugs. Usually easy to fix but numerous.
Tested, doesn't happen anymore in the latest version.
I just tried this with the lastest version (dev35b) and it still happens to me
Doesn't happen to me
What Minecraft version do you use @melinstagibson?