Hi Stephen,
This sounds counter intuitive.
I as an admin for example forgot to sign out before I added signups for other people.
The result is that these persons are now listed in their time slot, but the tasks are shown in my list of upcoming events.
I would think that if I signup for someone else, the system should never take my user id into account. This could be determined by the email address entered into the signup field. If it is the logged in users email address, link the user_id to the record. If I enter a different persons email address treat it like an anonymous signup and do not connect it to my account?
This would allow me to signup for someone else in a transparent way. Let me know if that might be something that could be improved and I can try to fix it.
Cheers,
Ulf