Thanks for posting.
There is no functional difference between 'Task Version 1.2 and 1.4.
The option 'Run tasks as soon as possible after a scheduled task is missed' is handled by 'MacriumService.exe' not by the Windows Task Scheduler. If you are experiencing a problem with this then changing the Task to run as an Administrator user rather than SYSTEM can resolve the problem, however, as you already have a workaround then this probably isn't necessary.
Nick - Macrium Support