whats the difference between the Youtube music mixes?

[marden]

I see 3 mixes for me; your mix, discover mix and new releases.

I don't understand why I have 3 different ones and when I read about them, they sound like they are almost the same, but the "your mix" is giving me some weird music. +95% of my liked tracks and library is electronic music and mostly house-like music, but everything in "your mix" is 90's rock, hiphop or pop...

Can someone explain me this?

 

[marden]

I F****** get Billie Holiday in my discover mix.

I have uploaded more than 300 songs to my library and nothing is further from my music taste than Billie Holiday. How can that be?