When trying to add contibutors/editors to my blog I have encountered that some of the individuals I've invited are supposedly "blocking email invites". However, I have aded about 5 contributors successfully and only two or three have "blocked". These are all new WP users who are creating WP accounts in response to my emailed invite to be a follower but who then I can't invite to be a contributor or editor, as needed.
1) Is there a way to have them unblock the invite so I can invite them to be a contributor or editor?
2) If not, is there a way to upgrade them from follower status to contributor or editor?
The blog I need help with is ihaveaplaniowa.wordpress.com.