Spiral balance works, barely

I just ordered two S900-35 balances.
one balances lost it's spiral as I was putting it in, and it dropped a glob of lubricant along the way. I also had to charge it 12 turns to grab a bite.
The window is operational, but if I lift it to fully open, it drops down 3" and stays. If I settle for just 12" open, it stays right where I leave it. It opens and closes properly except for that top-drop. And I'm a little concerned about the 12 turn charge.
My sash is 21 pounds. The house is 20 years old, I'm the original owner and these balances have never been worked on before.
Help! I have seven more windows just like this one.

your phone rep was kind enough to start this conversation for me. this is my first attempt at replacing balance, and I want to make sure I have the correct parts before I order the pieces for my othe 7 Windows's

is it possible I got a bad balance? or should I be using a stronger colored tip?
thanks I advance for your help me

The old balance is 35 inches long 9/16 wide there was no color on the tip The window pane that it's actually lifting or holding is 33.5 x 34.5 and weighs 21.6 pounds.

I might have discovered the error that caused this. When I charged the balance I pushed the spiral back up all the way in, thenwhen I went to charge it I twisted it out as opposed to just pulling it down. I did recharge this window I repaired and it now stays up however I did still need to do a full 12 revolutions to have it stay up. I'm wondering if when all the lubricant came out originally if that may have caused some damage to the balance when I originally installed it, or did I did just get a bad charger. This is my first time doing that so that's probably more of a question then the statement.

I hope that helps.