Membership Not capturing New Members for over 5 days

Several issues with correct capture of information
a) Members are not being captured in Members list or users list
b) Pay pal IPN is working although not showing any purchases through payment gateway
c) Mail chimp is also not capturing any information
At this moment, I really could use some very detailed support to get beyond these issues as soon as possible. I have spoken with Mail Chimp and through their testing they have indicated the API is working - they feel that because our "item" for pay pal payment is set up as a reoccurring monthly payment that may be interfering with not capturing the information correctly. Please advise. Thank you.