10 exercises in 60-80 minutes is excessive. Personally, if i'm really working my ass of in the gym and focusing on every lift, 3-5 total exercises is about the max that I can handle. After that, I'm tired, losing focus, and my muscles have been thoroughly worked.
What I'm trying to say is that you're probably not working hard enough on each individual exercise, instead you are just trying to do a million of them because you think more is better. So to directly answer your question, I wouldn't flat bench, decline bench, and incline bench in one session because if I worked hard enough on the first two, I'd be dead on the third and incapable of lifting any substantial weight.
Also, like I said in my first post you need a reason for every lift. Flat, incline, and decline bench are all very similar lifts so why not just stick with one of them and really focus on busting ass on it. Then maybe in 4 days or next week do the other. Hope that helped?