How to ensure dynamic segment doesnt kick out a contact from an email drip/campaign?

Hi i would appreciate your help.

I am trying to set up an onboarding sequence for new affiliates. My main concern is if i use the affiliate since date field filter to catch those affiliates who joined 1 a day ago they will fall out of the segment and the campaign curated for them after 1 day will not run further (the campaign has 3-5 emails triggered after few days gaps). How can i ensure the contact remains in segment? I was thinking of using the date filter in the drip/canvas itself instead? and does parallel branching instead of sequential canvas help?