Eric
I have checked the HPA PayPal account and none of your attempts to pay your membership subscription were successful. Successful payment have been made by debit card and via a personal PayPal account. Hopefully, we will establish what works and the reasons for any glinches as subscription payments mount up.
We will have to have a means for recording some personal information for membership applications. I attached a 'prototype' membership application that describes three methods of subscription payments just in case.
Malcolm