Yes, you will need to register each record using a different email address for each record. All your memberships will not automatically be linked to your account. Regarding the second record, please note you have two options:
Option 1: Register with a completely different email address.
Option 2: It may be possible to register your second using 'plus addressing' (add +1 before the @ symbol). For example if your email address is example@gmail.com, you can use example+1@gmail.com for your second pension record and so on if you have more than two memberships.
We understand that 'plus addressing' is widely adopted standard that is supported by most major email services, but not all. It does not work for btinternet.com or aol.com, and it may not work for some others.
Test to see if it works first: Send a test email to yourself with +1 immediately before the @ character in your email address. If the email arrives, then 'plus addressing' is supported, an you can use 'plus addressing' to register your other memberships. If you receive a delivery failure message, then unfortunately, this approach will not work for you.
Linking records is in our development plans and will be coming soon.