Messages not displaying in Inbox

Hi,

I just installed the eM Client, migrating from Postbox (I imported all Pobox settings). In the eM Client Inbox, some messages are shown, while others are not. I can see the difference by viewing my Inbox in the old Postbox install and the Google Mail web client. It does see like messaged pop up for a fraction of a second and then disappear. I’m pasting in this messaged screen shots from each. Can someone please help?

Thanks,

Erik