scara making curves

Hello i am pretty new with linux and aslo with linuxcnc, i know the basic things about programing, i can do that a scara can move into my control board, but i have a question, moving the joints it moves correctrly that the screen says, but when i try to move on world mode, on x it mad kind of well but made like a reallly big circule, but on y made a small circule that not move on the right axis, and i have to but on these order X Y Z C , i have to use the C axis to the rotatory becuase if i use the A it dont move and start to do more strange things.

can somebody help or have any idea about that issue i am using the last linuxcnc and the scarakins, now im trying to do an personal scara kinematics but i have some library errors.