Couple of comments
1. No, the bolt is not supposed to say open.
2. Running out of vertical adjustment on scopes with the 10/22 is a very common problem. I ran out of vertical adjustment with my 3200 5-15 (great scope buy the way). Here are some things that can cause it.
(a) If you glass bedded the rifle and free floated the barrel, there may not be enough support for the reciever to hold the action. To solve this try putting a preasure pad, either at the end of your glass bed in the forend, or at the very end of the forend. Make sure that your preasure pad creates an upward preasure on the barrel. If it doesn't it will preatty much be useless.
(b) Reciever "hump" can also be a very common problem on the 10/22's. If you take a ruler, or somehting other that is strech and put it over the 10/22 reciever without the scope mount on and put it up to the light you will probably see a gap of light in the middle of the reciever. What this does is it sort of elevates the front of the scope (which will make it shoot lower). Unfortunately there is not to much you can do about this unless you are willing to take out a file (but nobody wants to do that
(c) Another very common problem with the 10/22 is barrel droop. This is caused by over-tightening the action screws. In all honesty I forget what the correction is for this.
All in all the one I would try would be step numer (a). THis is what I did with my 10/22. The vertical elevation problem was solved and it shoots great
3. I use factory scope base with both the 11mm rail and the Weaver rail on it.
4. The burris signature rings are very good. You can buy additional offsets for them which is great if you are having problems running out of windage or elevation adjustments. The inserts are very good for the scope, and you don't have to lap them so that is always a good thing.
Hope this helps

Jordan