I have noticed that my strength in my barbell bench press has stayed stagnant while my dumbbell strength is increasing. What do I mean? On my working sets, I put up 245 for 4-5 reps in the flat bench press. I have been stuck there for two months. Meanwhile, my incline dumbbell press has gone up by 15 lbs (4-5 reps sets have gone up from 75 to 90lbs.) I have been steadily increasing in everything else. Any thoughts on why? And any thoughts on breaking the ceiling on the bench press?