Got random movie skins without paying

For some reason I got the MK2 movie skins for free the only ones I bought was Scorpions and Sub Zeros and just today I found out that I have every movie skin including the tournament Liu Kang skin which is odd since I don’t gameshare with someone who has mk1 definitive edition so it’s just odd let me know if anyone else had this happen to them I ain’t complaining but I wanna know if it’s a bug or not😭