It is not entirely clear to me what you have done here but if you already dumped your library and are starting from scratch anyway then perhaps there is something gone wrong in the database and it would be prudent to just remove it entirely to make sure it is 100%. Without logs I’m not sure what else can be conferred. If you want to do this I outline how in the following thread.
Based on the information you provided I don’t know either. There would likely be little to no upside to do a full reinstall. The post I linked to shows how to either get a fully clean video library so you start fresh there without having to setup everything in Kodi again (other than set the scraper) or dump your entire .kodi folder so you have a fully clean Kodi without having to reinstall the operating system.