multiple versions in same channel

I've run into an issue recently and I was wondering if its
desired 
behavior or not.

I have three packages:

A-r1
A-r2
B-r1

All of these packages are in the same channel directory, but
only the 
newest packages show up - A-r1 does not.  Normally this
wouldn't be a 
problem, but in this case B-r1 depends on A-r1 - so B-r1
cannot be 
installed because A-r1 is not showing in the channel.  Is
this the 
desired behavior?  I thought that RHN allowed you to install
any 
previous version of a patch or something from their
channels...

Thanks,
Jared

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