all my songs deleted and many random songs added???

[galsos1]

last 2 weeks from time to time i saw some random songs added to my music library and deleted them everytime. today i tried to hear my music as usual then recived a message that someone else hearing songs from other device (i dont remmeber the excat message). then i saw there is ALOT of new playlists i didnt knew. so i changed my pass and press the logout from all devices on the website. then few hours later ALL my songs deleted and many songs added (random songs i dont even know some of them). luckily i made a backup just before. for the real weird part for me, it says the songs added 8 hours ago, 16 hours ago, day ago, etc. and theres no way since i just deleted everything i didnt knew 3-4 hours ago(for sure) i really dont get what is going on...