Re: I cannot remove an old address due to not being able to delete old cards
G'day Mate, I had the same problem and from what I am reading so do a lot of others. The solution is quite simple.
Go to your EBAY account NOT PayPal.
In the account setting in EBAY select your Addresses and you can delete old mailing addresses. You cannot do anything with the old mailing addresses in PayPal. I hope this helps with this frustrating problem.