I've just installed OCS 2.1.2, and this is still a problem. In my case, at least, the redirect seems to have been occurring because I had no configured payment method (i.e. - the default PayPal option was unmodified, and unconfigured). Switching to manual payment allowed me to see the registration page.
This is a little discomforting when doing a quick evaluation and I immediately find myself trawling forums to get the registration page working. Might I suggest a message ('No payment methods are configured, so this page is unavailable'), and/or changing the default selection away from an unconfigured PayPal setting? Would a patch to this effect be appreciated?