Jumping into 1st probably left the spring out , the far right side one closest to the shift star. If it is a duneable that will make it even worse but a non duneable still needs that spring. As for not going into 3rd it could be shift star/ecce ntric adjuster not adjusted correctly or anytime an override wont shift into higher gears without letting off the throttle it may be clutch slipping. Does it shift hard going into 4th , 5 th as well? If so then clutch slip may be the problem. Otherwise , eccentric, shift fork.