PAPERBACK VS. EBOOK SALES

Sales of my ebooks show up immediately on my reports, but the paperback sales don't. Oh, they're upfront with that issue, that there is a delay of a couple of days to a month or so. I'm finding this to be true...and frustrating. I still have a problem with impatience. Waiting is so difficult. (I want to know faster!) The scales are balancing. Will that stay the trend?