register vs wp-signup? Which one

Recently added blog types to the site. This is where I get confused. There is a link on the site to register, put there by buddy press, and the link goes to /register, but the blog types do not show on that page. If I go to the /wp-signup.php page though the blog types show up. Which one signup form should be used ( i'm assuming the /register ) and why would the blog types not show up.. coincidentally also installed the TOS plugin and it does show on both pages... any ideas?

thanks, -J