Your sticking is probably from the tip of your rod getting stuck underneath the bolt or the bolt spring itself. Pull your body off and install your valve with the pump kit in place. Pull the pump back and see where it's hitting
Should look like so. If it doesn't then you need to bend the tip of the rod up or down to hit the right area.
Your semi auto problem Is due to your bolt spring doing its job. If you don't have a worn spring, you'll have to cut one down. When cutting though, cut a very small amount at a time. Cut a 1/4 inch off for your first cut then go in smaller increments from there. You want your spring just weak enough that it doesn't auto cock the bolt but have enough pressure on the bolt that all it tales to cock it is a very light pull of the handle. If you have it set right, you should be able to just jerk the marker back and forth real quick to cock it.
Also put the cut side of the spring towards the bolt not the body.
Another thing you're probably going to run into is a bolt leak once you have the spring set right. You'll need to go to a smaller spacer if the leak does appear.
Other then that. You shouldn't have any other issues.