[AchillesPunks]

Edit... never mind this issue, I think its TMM not reading the nfo on a rescan, you need to force a re-read. For some reason however, this force re-read is not needed using the default skin.....

I am not sure if this is a bug or not, if so, I am not sure if it is the skin or the addon..

When using the metadata editor addon, Changes in metadata info will not be written completely using Titan, it will be using the kodi default skin. 

If you change some movie metadata while in Titan, it will update but only within the skin.
If you scan again using Tiny Media Manager for example, the changes in the metadata are not seen.

If you do the same thing, but this time from within the default kodi skin, the metadata changes are written and can be seen when scanning with tiny media manager

Use medadata editor in Titan Mod and then open up the .nfo file and look to see the changes.. I just tested and the changes are there in the .nfo.