Try the following:
1) Remove the Stop animation from event 22 (it is not needed and it might cause problems after all)
2) Add the condition "Is not Attacking" (add the "Is Attacking" and invert it) on the event 15.
Also, make sure that the speed of the animations isn't 0.
As for the spawning, either add a "Wait" action in your events and after that add the "spawn an other object" action, or if you want the spawned object to come out from a specific place at a specific frame,
1) go into the animations
2) find that frame
3) add an image point to where you want the object to be spawned from
4) create a new event and as a condition add the "compare frame" = to the frame you want
5) add the "spawn an other object" action (don't forget to choose the correct image point)