i dead 3 time in a week. the reason its so tough for you is that your are trying to make your back grow in size and strength. PLers are mainly only concerned with the latter.
also PLing is about cycling your weights, you are not always doing sets of 75-85% oy your 1rm like many BBuilders. they use different rep schemes etc which mean that the back is never torched for long periods of time etc.
i used to dead, chin and t bar in one day and it was fine for me. also about the biceps, when i usd to train them they would be so sore for 5-6 days, really tight, they also gre like weeds then i stopped doing them. shoulders for mr recover quite well. in fact i discovered the more you eat, even if lots is pure rubbich helps you recover so much more quickly and easily. hope this help a bit