npub19d…jsya5 on Nostr: I am not sure I understand it correctly -- I pledged for a single book of ...

I am not sure I understand it correctly -- I pledged for a single book of npub13n409lc4d9w06xuqurrkkh4mtdzc2afc5m07tkkc26u7p2lcq04qkh3h2h (npub13n4…3h2h) and now I will have five more?

https://www.kickstarter.com/projects/mwlucas/run-your-own-mail-server/posts/4119893?ref=ksr_email_mktg_auto_backer_project_update_registered_users