Trakt used (might have changed now since they moved to using TMDB for data), the year as well since they just pulled the data straight from TheTVDB. So from Sonarr’s perspective nothing has changed. Not sure what TV Rage uses.
Manually no, but Sonarr handles it the same way it handles American Dad, with [thexem.de] (http://thexem.de/) https://github.com/Sonarr/Sonarr/wiki/FAQ#how-does-nzbdrone-handle-scene-numbering-issues-american-dad-etc