sounds like the lead isnt hot enough. 

Yes you can  melt the lead off the hook.  Be careful to not burn yourself.  I always hold the hook with pliers so my glove hand isnt close to the lead.

Are you skimming your pot of impurities before pouring? Wheel weights are usually contaiminated something fierce if you are by chance using some of those. When I started poring my own bullets I went to cracker barrel and bought a cast-iron ashtray/skillet with the logo in the bottom of it. I like using it myself. As you can tell though, I was poring them by hand and not a pouring system. I heated my mold and I also sprayed my hooks, mold and mold pins with wd-40, which seemed to help for some odd reason!?

When you are pouring small stuff like the 1/8 oz your mold should be heated because the lead really cools fast.  I put my mold on top of the lead pot and heat it as the lead heats.

You will also get a better pour if you flux your lead.  Bees wax is probably best but I just use candle wax.

First off fluxing is adding a substance that aids flowing and helps prevent formation of oxides in the lead.

You heat your lead then put in a marble size piece of wax.  It will melt and smoke.  If it doesn't flame up then you light it.  All this time you should be stirring the lead with a long spoon and be sure to wear gloves.

Keep stirring until the fire goes out.  Then you can skim off the crud that has floated to the top and you will have a pot of shimmering lead.  It will pour a lot better.

Another thing you can do to help small baits pour is to use a candle and smoke your mold.

I'm going to have to come watch you make some.  I've always wanted to see it done.

Jack,

   You should have seen my trying to pour with that latel the other day. I'll call you when
the melting pot comes in and we can pour some.
   

Note to self " cast iorn gets hot when you leave it on the fire".