I'm not trying to be a jerk, but you did come on the board talking about vegetarian diets soooo....
In 18 sessions you've managed to add an average of 3lbs per session to your squat and deadlift, less than 1lb to your bench, press and power clean while gaining 4lbs at the ripe age of 25 years old. Let me be crystal clear, in this age demographic (barring some sort of endocrinology or psychological problem) your gains are less than half of what I've seen with my clients and friends. Is this due to your vegetarian diet, form, mind set, or something else? I'm not sure, but here's what I can tell you...
You have about an 80% chance of being b12 deficient, having high homocysteine levels, and suffering from slowed progress whilst strength training. I'll just go ahead and say this, a vegetarian diet cannot be optimal (even when supplemented), is not what we were designed to eat, and does not save animals/biomass from destruction (in fact it increases it). I don't particularly care if you do a vegetarian diet and do SS, that's cool man, do what you gotta do. I just don't want others to come on the board and think vegetarianism is a viable dietary option for standard run of the mill folks.