By selecting the current issue, you have chosen to start your subscription immediately!
This means that whether you pay via PayPal or credit card in the shop, the price for the current issue + shipping costs will be charged immediately! For PayPal payments, this is done through a one-time setup fee.
Subsequent payments will be charged upon the release of future issues.
By selecting the next issue as your starting issue, you have chosen not to start your subscription immediately!
This means that with PayPal, the first payment (price + shipping costs) is due when the next issue is published. If you pay by credit card through the shop, the first payment (price + shipping costs) is due immediately to validate the credit card! The next payment (price + shipping costs) is not due until the issue after that is published.