Sorry if my reply was untimely.
The first problem you’re facing have been reported before and the fix would be changing the value of max_input_vars on the server. you can check the details here http://support.creiden.com/forums/topic/content-disappearing-blocks-saving/
For the second problem it have been also reported, and the fix will be live upon the next update. You can save your pages/transfer previously created pages using the export function for now.
details on how to export/import a page or a block can be found here http://docs.creiden.com/circleflip/content-builder-3/builder-controls/importexport/
and here http://docs.creiden.com/circleflip/content-builder-3/builder-controls/exportimport-block/