Hi ScottLougheed Thanks for your suggestions. It's a work around that can help. Unfortunately, any search under both accounts will result in hits of the other account. ..... and this was te reason why I bought two Premium accounts. I have to live with it until Evernote solves this problem.
As soon as you logoff on Android on one account to log in into your second account, all downloaded notebooks are deleted (because of safety reasons). If you login again on this account it has to download all these notebooks again. This way you have a lot of data transfer..... Is there a way to solve this problem?