wp-login.php shows “Register” but redirection goes to the wrong multisite

Problem: https://www.domain.blah/wp-login.php shows “Register” (for new users) and the hover text says https://www.domain.blah/wp-login.php?action=register

But when one clicks the Register link, they end up at https://domain.blah/wp-signup.php (note the missing www in front of the domain name).

So I’ve got a redirect problem in multisite.

I’ve set up multisite, and have three defined sites. Site ID = 1, however, I don’t want to use. Originally, I had set up the blog on a single site, and then I wanted to move to https://www.domain.blah so that I could also have a https://test.domain.blah

Since the original site was at https://domain.blah, I couldn’t figure out how to not create Site ID = 1 as https://domain.blah

I’ve set up Site ID 2 as my main site. Pretty much, everything is good, stuff works, and I get to have some fun learning new stuff. ??

But now I want to experiment on https://test.domain.blah – specifically trying to do stuff with new user logins. But in either case, https://www.domain.blah or test.domain.blah, the wp-signup.php is found at domain.blah

domain.blah looks nothing like https://www.domain.blah or test.domain.blah (I’m using NS Cloner to delete and remake the test site from the www site).

Clearly I’ve got a redirection problem, that has something to do with Site ID 1, the domain.blah site.

Where should I be looking to find out where this redirection problem is coming from?

Thank you for any help you can give me.

David G.

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