FYI I am a Stake Technology Specialist in a YSA Stake. I've been working with all of the Bishoprics, of the 13 wards in my stake, to make sure they have access to the online tools.
In the calendar, the "Ward Calendars" and "Stake Calendars" sections *only* list their home ward/stake (the unit where their church records live). The "All Calendars" list shows all of the calendars from both home ward/stake and the YSA Ward & YSA Stake. As there does not seem to be a way for them to tell the difference between multiple "Elders Quorum" Calendars, I'm encouraging all of the Wards to append their Ward name to the end of all ward calendars.
Then we have calendars like:
Ward Activities
Ward Activities - Riverside YSA
Stake Activities
Stake Activities - Pioneer YSA
This makes it clear which are YSA calendars and which are home ward/stake calendars. Good luck on the roller coaster for out-of-unit leaders of YSA Units. There's always something that doesn't work right for them. I have high hopes that eventually, these out-of-unit leaders will have a good simple experience. Until then, *you* are the first line of support.
Good Luck!