Double tunes in my library

I recenty detected that many of the songs on some records are listed twice. Sometimes only two or the three first tunes, the rest is listed the way they should, and on some records they all do.
My library is stored on a My Cloud Mirror NAS. I use a Mac mini Mojave and Audirvana 3.5.26 to navigate my music collection. I am now tired of this happening. Is there a way that this can be fixed?