Photos synch google+,picasa,gallery

I'm trying to upload on google+ photos all my old pics so I have it backupped and ordered there, but unfortunatly I encountered some strange behavior. Here is what I did: 1. Uploaded from my pc with picasa all my album to google+ (checked the date were correct) 2. On Google+ web everything is ok (date and order of the album) 3. On google photos app on my Nexus-4 everything is fine as well. 4. If I go on picasa web album some album have incorrect date (seems they have the date of upload instead the date when pics were taken, but it's the same album on G+!!!) 5. If I synch picasa album in my gallery on Nexus-4 pics have the same problem with date. Anyone has the same problem? Also, if I turn off google phots synch and I clear the gallery app data all the picasa album disappear but if I do refresh from gallery they appear again and I didn't turned on google photos synch. Again anyone with the same problem out there? Any solutions?