You have failed to mention what engine you are running,

Also make your pitch curve linear and adjust your throttle curve to give your correct head speed.

Next thing is the idle mixture and not the main mixture screw needs to be adjusted for hovering as the idle mixture range is controling fuel up to around 75% throttle opening.

My normal curves as an example:
pitch -9.5 to +9.5 linear
throttle: 1-0% 2-35% 3-42% 4-68% 5-100%
this is just an example as my setup is totally different to yours, you have to experiment yourself as no-one elses settings will be the same as yours even on an identical ship, start with the basic settings from the manual then adjust as required from thereto get a head speed you like.
Instuctions are not set in stone nor did they come down the mountain with Moses

Edit: forgot to mention, different exhaust pipes make a hugh difference in mixture settings, recently my zimmerman pipe failed, so for the rest of the day I borrowed a stock hiribo pipe from one of the guys, I had to retune and needed about 1 1/2 turn to get the damn thing to run, then got a curtis MP11 pipe and had to reune again, that fell in half so got a replacement zimmerman again and once again retuned, two weeks later the weather really changed and once again I needed to retune.

It never really ends, just keep at it and if your not sure how it's running always go rich and lean out again