One thing I dislike is when I forgot to inform Atom about the names that I want to drop one month earlier, I'll get a policy violations warning. As their rule: "Too many violations typically result in account moving to Not In Good Standing...
I had a similar experience last week. I handreg a domain and listed it at Sedo, Afternic and Dan. Then I checked the Dan lander, everything's correct. Half hour later, I received Dan's email stating the domain was sold for $99 via distribution...