"The games disappearing" happened to a friend: His account suddenly lost all bought games - and support NEVER helped him.
And one bug happened to me when registering: I always got a message saying "I can´t register rightnow and I should retry later". Only after googling I found out that the registering form on the website is bugged, it shows you that any name is free, even if it´s not (of course you can´t register if your name is already taken); That bug seems to be there since the site was made - and it also has been reported several times before: Still not repaired.