(this may not necissarily be a bug with rhn_register, but it seems the best place to file the bug) rhn_register allows me to register multiple machines under the same login with the same name. I managed to register my laptop as 'loiosh' three different times. This means that when I go to the entitlement page to make sure I can still use up2date, I have to guess based on nothing but the order as to which registration is which. Each login should not be able to use the same machine name twice for sanity reasons.
intentional, at least for the time being