Rillian, can you give a couple examples?
If a DM doesn't use an actual rule correctly, you can just bring it up with them. If, for instance, the DM doesn't give you an attack of opportunity you should have gotten, point it out and I'm fairly certain they will be ameniable to it or explain why it doesn't happen.
If you honestly need to see ALL the dice rolls (at least all those your character makes), your going to have a restricted list of those DMs that could run you. I know that not everyone posts all of that, and often they don't even give you a round by round out of character set of actions (most would say, "he runs at you and brings his staff around to strike, dealing 4 points of damage", without adding the OOC notes 20 feet moved to G1 and attacks with quarterstaff, 22 to hit, 5 damage reduced by 1 due to damage reduction). I'd be able to, as I do roll all the dice, I just don't always post them. But most DMs in our Play by Post community tend to limit posting results of dice to combat and perhaps called checks like diplomacy or appraise.
I leave it up to you to decide what your going to think of that. You do have a choice of DMs in LEW, but the majority are more free-form than technical. I trust them all the same, as I like both and can play and run both ways. At least with this community, if you don't like how one game is going, you can keep the character and go on a different adventure.