$0.99 * .40 = $0.396
You earn $0.396 per sale on a $.99 book.
Raise your price to $1.00 and you'll get $0.40 per sale.
Since writing this post and emailing the Pubit folks I have just now received the reply that they don't know what I'm talking about. They see it at 1@ .40/ 4@ 1.60 the way it's supposed to.
So... in between then and now someone had fixed it.
Apparently, there is no need to change to $1.oo as it's not supposed to take pennies off.Thanks for the thought though. I'm just glad to know I'm earning my full amount.