hey, I cannot for the life of me figure out why this is happening ,I rigged and skinned a character DT(digitaltutors) way and im getting weird rotating deformations in the y axis, this happens all the time, on every skeleton I make, I don't know what im doing wrong ,all of my joints have 0,0,0 rotation values also
please help

https://s25.postimg.org/t2szbdwdr/Wierd.jpg

https://s25.postimg.org/bqsmpy2wf/Wierd1.jpg