[Plugin: Email Users] role manager can’t change author permissions to not allow email multiple users

hello i am using role manager plugin

which has for the author role …email single users …email multiple users both checked

i do not want the authors to be able to email multiple users ….but when i deselect it in role manager and am on the write screen as an author it says you are not allowed to sendemails

but i should be able to send emails but only one at a time …how do i fix??

i don’t want authors to basically send to the entire list at once thank you for such a great plugin!