I spent a lot of time testing different scenarios and discovered the following outcomes with the "Email link then redirect to confirmation page" download settings configured:

1. If a new user downloads from the email link and is NOT logged in, but registers for an account after the fact: the download does not show up in their history.
2. If a registered user downloads from the email link and is NOT logged in: the download is not registered in their history when they do log in to their account.
3.  If a registered user downloads from the email link and IS logged in: the download is registered in their history.

How can I set it so a user can view their downloads history in scenarios 1 and 2? At the very least, scenario 2 should register history- because it's frustrating that a registered user can't view downloads associated with their email address even if they're not logged in.