Yes, PayPal downtime is extremely rare.

1. Will make a note to change it (we have plans to redesign the registration process anyway)

2. We will investigate. You mean that macros are mixed up - {First name} insert last name?

3. We will investigate. Can you please send us their names to support email?

4. Right now the only way to look up deleted attendees is with a database query. (Will be changed in the future). We will check into this.