Thanks for contacting Author Central.
I've reviewed your request and I can now confirm that the customer reviews are showing up in your Author Central account.
I've made some changes as well internally because as you stated they were German books under your account, those books are removed and they will not be added again.
Regarding the books with Steve Miller, I apologize to see that they are not showing up on your account, I would recommend you to add them once again or you can provide us with the ISBN or ASIN number of those books and we will add them for you.
I hope this helps! We look forward to seeing you again soon.