Multiple registration pages for popups?

When I use the shortcode: [couponaffiliates-register] on other pages of my site, it only shows the visitor can log in and not register. I have tried using different browsers, and incognito to test. It’s always log in. This may be related to why my welcome bonus doesn’t work when a user registers on my site as well. Or Is this how its designed?

I am trying to put the shortcode on a popup for people to instantly register, instead of following a link to the registration page.