The springs fit the bolt properly. They will be tight but only at the very front and very back. The front of the bolt sits beyond the spring when the valve is inserted into the body. The back is a non-issue because it doesn't move inside the spring. The spring diameter actually gets larger as the spring compresses so it never tightens on the bolt.
You need the bumper on the front of the valve. It protects the bolt and valve from damage.
The trigger rod should be adjusted so that there is a tiny gap between the back of the trigger and the front of the trigger rod when the trigger is held against the safety with the gun aired up and ready to fire.
If the bolt is resetting enough to open the on-off to charge the front chamber and fire another shot, then the sear is rotating far enough to catch the bolt. If you are experiencing leaks while the bolt is in the reset position, or if the bolt is just barely catching on the sear, then you may need to tune your level 10 just a bit. Make sure you remove all the shims first. They will cause leaking. Use the largest carrier size that does not produce a leak when in the ready position. Always use the same white carrier oring when changing carriers. Its the oring tension you are adjusting.
Except for the Automag in front, its usually the man behind the equipment that counts.