Thanks a million EddyOS for helping me once again! While i were at it, updated TWRP and ARHD as well. Maybe a little note i was only able to see my firmware version one time. (step 6.) Any other boot to the bootloader is showing an empty OS field again, also from the fastboot getvar all command the main-version is showing an emtpy entry again.
Still struggling with my backup though, somehow TitaniumBackup isn't displaying my backup. Unknown sources are allowed.