We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
I recieve my sales figures on the seventh of the month and log them in a ledger for tax purposes. Today, I logged them and later checked them. 27 sales of one of my novels vanished when the start date was set for 01/02/15. If I set it to 02/02/15, they reappear. The date of the sales reads as 28/02/15. I have contacted the admins and await reply. I suppose I could have sold the 27 on the first of Feb, which would explain this, but unlikely. Various other sales of the book still show. Also, three or four other transactions of other books vanish. Anyone else notice this?