Collecting data online will wipe out any SPSS reporting for checkbox questions set to Checked/Unchecked in your SPSS settings for responses that were collected offline. The online responses will report just fine.
The workaround for now is to set those columns to Labeled Values instead.
We’ve investigated this and decided to not address it for the time being. Please use the workaround described above and let us know if this is also affecting you or if you have any problems with the workaround.