Okay, Brain Trust here at +User2User Community: problems with invitations, part twenty-eleven.

Okay, Brain Trust here at +User2User Community: problems with invitations, part twenty-eleven.

 Why doesn't #Google provide a REASON and list to WHOM the "could not send invitations" error is triggered by instead of this random, unhelpful bulk message? #Feedback   requires that I mention exactly what occurs, so here we go.
1) I have a Circle of people I want to invite.
2) I select that Circle and click "Invite."
3) Instead of inviting all the members of that Circle it is possible to invite and -then providing a list of those it could not invite and EXPLAINING WHY,
4)  it just refuses to send invitations to ALL of them.
5) So, idiot problem that it is, it forces me to go through in ever-shrinking groups of 5 - 10 or 2 - 6 or whatever to ferret out who the culprits are that are ruining my invitation Circle.
6) I remove them and try again.
7) that does not work because MORE are still problematic.
8) lather, rinse, repeat.

It took me over half an hour to go through and remove about 8 seemingly problematic members from over 100 in that Circle just to get my invitations done, and some of the people Google ID's as "could not invite" I have no idea why it couldn't. 

Did those people recently block me?
Did they somehow indicate (but Google, in its infinite ignorance, sees it unwise to tell ME) that they don't want notifications?
If so, why can't each person just turn them off their notifications from me instead of blocking the HOA Event page's invitations, if that is what they are doing?

HELP?

Thanks.