Hmm there's a pandora's box of stuff here. Firstly technique will make a huge difference, like you wouldn't believe, secondly you can't push up oly numbers like deadlift in that training the same sort of percentages won't work as well (eg you can't be powercleaning 80-90% that often, even if it does feel very easy).
Lastly, most of what's said here is a bit useless without video, although it's a bit of a step, just post a video of your lifts (both in warmup and near max weights), that'll make the biggest difference (unless you can have someone with experience see it in real life). The only stuff you can really solve without that are specific problems like ALI79's, in your case perhaps watch your grip width (too wide is hard to rack), make sure the bar is far up enough on your shoulders (pressing on your neck), and practise with light weights.