Why am I having all this trouble with FF14???

[Fenwick]

Is it because I, and my siblings, share the same credit card & paypal account that SE prohibits us from using in more than 1 Sqaure account? Cause the problems always start with the 2nd or 3rd payment in an other account!

At least part of your issue is probably this, when it comes to credit cards. I had the same issue with my partner, and we had to put our subscriptions on separate cards to fix it. I contacted support before that, and they said that this was the issue, I'm surprised they haven't changed this yet. That was about two years ago.

[silverhope]

Is it because I, and my siblings, share the same credit card & paypal account that SE prohibits us from using in more than 1 Sqaure account? Cause the problems always start with the 2nd or 3rd payment in an other account!

This is prolly your issue and it took them time to notice the same names on the account. (assuming its a parents name?) The auto thing prolly dosent check for this but a tech did. If anything you should get your own card and build some credit, sharing cards and info is never a good idea...