1) I assume it was a short-term leadership opportunity, so based on that, I'd say Yes.
2) Can you give me more information? Were you a study group member before becoming the Lead? How many hours are involved? Can you describe your role further? Why do you think this is more leadership-y than teaching?
3) Generally, No, not unless they were with the same organization. Or at least, were largely similar in the roles.
2) The role title was 'Peer-Led Undergraduate Study Group Facilitator' and it was for a semester (approx 60 hours) where I would coordinate and lead discussion for weekly study groups for a Biochemistry course I was simultaneously taking that semester. That is a good consideration about leadership vs. teaching. I also have a community service activity where I was an art teacher/mentor for a child so it could be effective to bundle those two experiences?
Thank you!