Bests & Worsts Reviews from Amazon

I have had this 2 days.. I have had to download the same books on the 'integrated' Kindle app 4 times since it seems to think I want to remove them every time I switch to a different app. When switching out of the Book app, it doesn't save the book I am reading (it does save the location on the book I am reading) and I have to re-open it every time. Kindle app on iPad and phones works much better. I will be returning the device and not asking for a replacement.