I have two copy macbook in icloud

I installed clean mavericks and created a new login, but it didn't like me. And I went beck to mountain lion using time machine. Now when I go to safari and open opened pages on other devices (in the cloud) I have 2 macbook and their pages. At the same time on the page icloud.com i heve one macbook.

How to clean pages in cloud?

This problem last 3 days....