Shirts Are Optional

BENCH:
65lb x3 
95lb x3 
105lb x3 
[115lb x5] 3x 
115lb x3
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DEADS:
115lb x3 
135lb x3 
155lb x3 
185lb x5 
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On the last set of 5 of the bench, I actually slid down the bench about 4". I had just gotten done talking to Frank about how I don't like wearing t-shirts on the bench because I can't grip it with my shoulders. Thankfully he was there to assist on the lift with that one. I had also loosened up a little and I think that slack in my body led to me slipping because it changed my angle on the bench. The only option (because I didn't feel like running upstairs for a tank top ) I had was to take my shirt off and continue on. I'm disappointed that I only managed 3 more reps. 
I seem to have plateaued on my deadlifts which is really pissing me off. My plan of attack is to do some hamstring accessory work to see if I can strengthen that area. I also my throw in some block pulls as well. 
Plateaus are bound to happen but every plateau can be overcome with steady work.