Resource download from wordpress website

I have a new website in wordpress - it has a resources page, where the available downloads are linked to emails sequence in IS. I have an issue, where if someone requests one of the resources, but they are already in our CMS, it will not send them the download - it says “this email address has already subscribed”
Is there a way around this, so that this contact can be imported, and they receive the download anyway?

Interesting one, I haven’t seen this personally, so lets start with a question:

How are the contacts being sent from your Wordpress site to Infusionsoft?