The reason you're not recovering well from your workouts is because you're not eating enough. At 6'0 150 lbs, you are very very skinny. Congrats on gaining 15 lbs of what I assume is largely muscular bodyweight, but you've got a ways to go. At your height you'll have to weigh at least 170 to get rid of the emaciated look - and even then you'll still have a ways to go before you look strong.
Eat more. You're at a point where eating everything in sight will be good for you. At some point you'll have to be more conscious of what you're eating, but for now I'd suggest you go all out. Eat as much as possible, and then keep eating. And drink a gallon of milk on top of this. Right now you're progressing at the same rate a woman would progress on SS, and that's because of your low bodyweight and your inadequate calorie intake. You will be able to progress with 10 lb jumps on your squat, 15 lb jumps on your deadlift, and 5 lb jumps on your press and bench press if you make sure to eat enough.
Also, stop doing situps and dumbbell rows. You don't need them at this point to help your progress, and since you're not eating enough they're unnecessarily adding to the stress that your body is having trouble recovering from.