<VV> bleeding a master cylinder

[John McMahon]

I've been bench bleeding my dual master cylinder, and I think I did it right 
but I'm not sure.  I kept pumping until there were no air bubbles in the 
fliud into which I was pumping, and then I put plugs in the outlets.  Now 
when I try to pump the cylinder, I get about 1/8" movement (as it should 
be), but here's the strange thing:  I get a little "geyser" of fluid 
shooting up through the small hole in the reservoir further from me, but 
this doesn't happen in the nearer reservoir.  I'm always suspicious when two 
seemingly identical components don't function the same way.  Anybody out 
there know what's going on?

Thanks,

John McMahon
1965 Monza coupe