Season.tbn thumbnail issues

Hi

I'm very new to Media Companion (and this forum) after ditching Ember and so far I'm loving it. Not one to ask silly questions as I've tried to Google my issue also.

When I add my TV Shows to XBMC it pull all my data from the .nfo files and .tbn files that Media Comp has generated. The only thing it does not bring over to XBMC is the Season.tbn thumbnail. It seems that XBMC is still scraping this from the internet however Fanart and episode.tbn files are ok. Is there something Im doing wrong?

Example is Archer shows the season thumbnails in XBMC however these are different to the ones showing in Media Companion.

Not sure if this is me being stupid, XBMC or Media Comp.

By the way I've removed the source and re-added it so it is scraping the new information.

Thanks in advanced and hope someone can help.