Because between two keyframes with the same position there is movement?
It would be because of the influence or speed?
1st. image: 'x' position is 384px
2nd. image: 'x' position is 387px
3rd. image: 'x' position is 384px
The keyframes to which I refer are selected, in the middle.
There is a change in the middle between two keyframes that are in the same position, no keyframes between them.