What is wrong is not exactly clear from those screen shots (but thanks, they at least show what is)
Let's take the first image of the folder
- All those backdrop images are just wasting space, if you want to use them, look at using folders "extrafanart" and "extrathumbs" with advanced settings.xml exclusions and a skin that can utilize them.
-Kodi (I assume) uses "Gone in 60 Seconds (2000)-fanart.jpg" and "Gone in 60 Seconds (2000)-poster.jpg" or just poster.jpg and fanart.jpg if they're in their own folder.
Artwork (wiki) the 720p in the name complicates the scraper and not needed.
-medainfo.data and movie.xml are superfluous, but may be the source of your issue. You can't have strange foreign files mixed in, Kodi tries to make sense of them, I do remember the early days of media-browser and I left .xml files in the folders to my detriment, they screwed up everything.
It should look like this:
Gone in 60 Seconds (2000).avi
Gone in 60 Seconds (2000).nfo
Gone in 60 Seconds (2000)-poster.jpg
Gone in 60 Seconds (2000)-fanart.jpg
banner.png
disc.png
clearart.png
logo.png
Second image is the results of some abnormality.
You should only have one poster per video. But if you have trailers, samples etc.. they are seen as a movie and will get added. If you have multiple sources pointing to the same folders (a big mistake is to specify a hard drive source, then make a sub folder of that same drive another source, they get scraped twice!). With any video in focus, using the system information panel you will see the exact path of the file in the bottom left. That will tell you if you have multiple sources.
Suggestion: do a batch deletion of all the *.*.xml and *.*data files in your storage system, go into Kodi and do a system clean, and let's see what is what after that.
and dump MCM and MediaBrowser, Kodi is all you really need.