That is an API issue with api.weather.gov -- sometimes, the loading of the GFS forecast to the api.weather.gov servers goes awry and you get odd issues like that. The scripts both use exactly the same data (gridpoint forecast) for display, and just present what is included in the JSON returned from the API. The advforecast2.php V5 will cache the result for 3600 seconds, the NWS-forecast-map.php V2 will simply display the last 'fetch' (no caching).