Jquery动画无法正常工作，表现得很奇怪

I am new in jquery. I have just created a basic animation using .animate property. But the animation is acting weird. It is an hover animation. If i hover in a section it get smaller and animate. But If i hover the circle from the top it is working. If i hover from the bottom section it is not working.I am new in jquery. I have just created a basic