two ntp RPMs?

[James Jones <jamesjones01 mchsi com>]

I just upgraded from RH9 to Fedora Core 1. I grabbed the Fedora apt RPM 
and did the appropriate rpm -U, and moved the new sources.list into 
place, since rpm told me it hadn't overwritten the old sources.list 
file. I then did "apt-get update" and, after it had grabbed the 
pertinent lists, it warned me that I had two (!) ntp RPMs installed: 
ntp-4.1.2-0.rc1.2 and ntp-4.1.2-5. I presume that 4.1.2-5 is the one I 
want to keep, but just out of idle curiosity, how did I end up with two?

   James Jones