That should work so there must be an error with the event. Please link to a screenshot or project file of some kind and this can easily be resolved.
Also just a guess from not seeing the project, you seem to want to set the position of multiple sprites but probably only have a single instance on the event sheet so my guess is that a single sprite is just moving around and then hits the final position you set. You need to create multiple sprites and set their positions accordingly, depending on what you want to happen of course. You may have set this up correctly though and there are other errors, it's hard to assist with guess work.