2lb pull weight is way to touchy for casual use by people not used to auto-loading guns...especially if you let others use it...
Now that you know where the problem is...it not an adjustment...it is the replacing of parts that have been modified...
The video I linked you to above has a lot of information...
My trigger pull is between 3 and 4 lbs and I don't want it any lighter at this time...I am not a weapons master...on the other hand I have fired many thousands of rounds from auto loading rifles and pistols in the last 40 years...people who are intense about making the smallest possible hole in a sheet of paper are the ones who need super-light trigger pulls...
More along that line...NRA match rifles cannot have too light or too sensitive of a trigger pull for obvious safety reasons and that is for competition among people striving for supreme accuracy...
In addition to the other tests already outlined for you...in dry-fire mode...see of jarring the rifle will release the hammer...if it will...you definitely need new parts...
The trigger pull is normally not adjustable unless you have something special like a Kidd Trigger...
However, you can get parts with adjustable trigger travel...and you can get the trigger pull to be in the 3-4lb range or close to factory around 6 depending on which parts you buy...
Don't know what your budget is but I would get this Hammer and Sear...
Power Custom Pre-Travel Adjustable Hammer Sear Ruger 10/22
I would not use the springs that come with it...
I would also get this trigger...
Volquartsen Target Rifle Trigger Ruger 10/22 10/22 Mag Black
Those products will give you 50 to 100% stiffer pull and allow you to adjust out the slop in the travel...
I would also get all new factory original springs AND an original factory Hammer...
Then you can start out with a much better than stock trigger but with factory trigger pull weight and if you choose to lighten the trigger pull install the Power Custom Target Hammer to get in the 3-4lb range if you are not happy with the stiff factory pull...
The reason why people modify the factory trigger is because it is so sloppy and so stiff it makes it difficult to not pull the gun off target when you pull the trigger...