When submitting a SharePoint app to the to the Microsoft Office Marketplace, you may receive the following message via the Microsoft Office Marketplace – Validation Test Results page:
7.8. Your app’s package must be correctly formatted.
The version number submitted via the sellerdashboard is not the same as that in the app package. These must be the same.
The version number in the sellerdashboard does not conform to structure. SharePoint version numbers must use n.n.n.n structure (e.g. 220.127.116.11)
In order to fix this, edit your App Listing and ensure the version number submitted matches the one you put in the app.manifest.xml file:
Once this is done, re-upload and re-submit your app.
Validation policies for apps can be seen here: http://msdn.microsoft.com/en-us/library/office/apps/jj220035(v=office.15)