Mopar Performance Distributor adjustable advance?

Hi I just read your comment, I have the MP with thin weights and use the multiple sticks each marked differently not the stepped stick I had years ago with a Mallory Unilite.
Ok so at 900-1000 rpm after setting with the stick marked 18 I had 12 degrees so you add the 18 and 12 together and that means I have 30 degrees initial??? If that is how it goes isn't that crazy high?? I still confused by all this and is this why I have warm slow cranking??
Thanks Ron