Not that I know of, other than being VERY careful in proofreading. I have made a few posts that made me wish I had to pass a breathalizer test as well :D The double posting, I never had that happen to me that I am aware of.
I sent a message to myLot on the second day. Yesterday I got a message thanking me and informing them they are taking care of it. So it took about two weeks after sending the message to them. I suppose it takes a while to manage 95,000 members ;)