Alright. In that case there are a couple of things you can try. Everybody has their opinions and so forth, and these are mine based on experience and a whole lot of T & E.

You are hitting high and right... so here is what I would try first... USING FIELD POINTS!!!!!!go out in the yard and put a dot on your target up near the top... something like a bright orange sticker you can easily see. Then, run a line of masking tape straight down from that to the bottom of the target. Walk back to 20 yards and using your 20 yard pin shoot an arrow at the dot. Adjust your sights so that you can hit the dot itself... you need to be dialed in tight. Next, step back to 30 yards and shoot at the dot again USING YOUR 20 YARD PIN! Of course you are going to be low... thats the point.... next repeat at 40 yards. What you'll have is three arrows in the target at different points vertically. If your arrows are running in a diagonal line from lets say 12 o clock to 8 o clock (left), then you need to move your rest slightly to the right. When I say slightly, I mean like 1/32" at a time. Then repeat the process until all of your arrows are hitting in the straight up and down vertical line.

Here are a few pictures to help guide you:

This would be an example of needing to move your rest to the right... just move the rest in the direction you want the arrow to go. Notice I designed a target face just for this very purpose...





Once you have it dialed in right.... it should look more like this.....





This will help you establish your true center shot. Lots of shops and pros (including me.... this is what I do for a living) start off tuning a bow by using a lazer or tru-center type device to square the arrow to the string. Its a great aide and great starting point... but it ends at that.... its a starting point.

Give it a try and let me know what you've got. As to the high problem.. you'll probably have to move your nocking point a bit. I know this seems a bit like going to your elbow first to scratch your knee, but its important to make sure everything is right before we start making adjustments to the bow itself... which we will do to get the field points and arrows hitting exactly the same.... or as close as we can get them anyway.