@cmac7 wrote: channel guide needs to be changed to the correct sort [sic] time
No argument there, but Shaw/Rogers gets the Guide information from a third-party.
Contact Shaw/Rogers, to get them to contact the provider of the Guide information.
Also, set your PVR to "start recording 20 minutes early", and then use the remote control's "fast-forward" button to skip the first 3 minutes of the recording.