My WPMU Dev API Key keeps invalidating and activating notifications

In the last 2 days, I have logged on to check for updates and seen that my WPMU Dev API key has a red background and is classed as invalid, both times I clicked the "Check Key" button and it turned green again.

My main issue tho is that in turning green all the WPMU Dev spam notifications were turned on in my members wp-admins and this is unacceptable.