Is there a setting or new copyright rules with Groove in w10mobile and android devices?

[Mike Newport]

I use a Nokia Lumia 1020 as my daily driver and have been running preview builds for 3 months now. Well I got kinda bored so I purchased a cheap android device to see how different microsoft apps where on the android platform. Well once I downloaded groove on android 5.1 and signed into my account it said something about changes are being made to your library beware this affects your songs across all your Microsoft devices. What's wack is it took alot of my songs and made them unavailable. These were songs I have on an external hard drive I use with my PC. Well now the songs are fine on the PC, but those 400 songs now will not sync to my windows mobile 10. It says they are no longer part of the catalog and cannot be accessed. And they no longer show up in w10 mobile groove app.So I have to manually reload them every time I hard reset. Long story simple question, did the android groove app randomly decide which songs i bought and which ones I downloaded for free from music import apps on 8.1. Is there a setting to stop it from reading the metadata or is it some new antipiracy thing?