Major Facebook Fail

I created a relatively small, private group on Facebook. The group is for messages relating to a volunteer orgranization. Most of the volunteers are Facebook users, so it seemed natural that we could send updates to around 40-50 volunteers and they would probably get them more quickly than via email.

That’s the whole idea of Facebook, right?

So, why would Facebook queue meter the distribution of our messages? Everyone in the group has signed up to receive the messages, so it cannot be spam by definition. The group is certainly not large at around 40-50 people. I don’t send any other bulk messages from my Facebook account, so I can’t be flagged for suspicious activity.

The group messages to this group are somewhat infrequent. Is there some other reason for such a lame warning message and action on the part of Facebook? Why are they doing this?