Yeah, I would recommend dropping medium and high rep work. Seems like you do better with low reps.
I assume the 30 pounds you've added is equally distributed over your frame. If so, you seem to gain a good deal of strength relative to your size increase. Are you trying to gain mass? Maybe you could bump up your calories (since you're only 22, you can probably get away with high-calorie diets without it making you fat). BTW, nothing derogatory was implied with the use of the word "only".
If you already are eating a ton of calories and are still not gaining weight as quickly as you want, I recommend two things (besides the above recommendation to drop medium and high rep work):
Do power work. Try some O-lift variants. The three I like are the snatch balance, clean from the hang, and power jerks. these are easier to learn than the competition lifts. For working the pressing muscles, do the Westside speed benches. For upper back and biceps, do bounce pull-ups.
Start at the half-way point of a pull-up (where the upper arms are parallel to the floor). Now drop to almost full extension and "bounce" back to the starting position.
Yeah, I know, anyone reading this post will say I'm recommending nothing but joint pain for you.
Anyway, work on improving your technique and speed on these exercises while doing just enough work to retain your hypertrophy and max strength. Then go back to a hypertrophy program (CW's multiple set/low rep programs, EDT, or even Poliquin's advanced GVT). I think you'll be pleasantly surprised.
Hmmm, this post has gone on waaaaay too damn long. You probably didn't even want all this advice. I apologize if this is the case. Anyway, just trying to help.