Why the one widget‘s variable is changed in the other widget?

[skecisai]

this is my first widget PreConstruct Function：set the first value of Points variable to text

And this widget shows like this：it is normal（x=0, y=0）

but when I use this widget in other widget，the Points variable shows weird(x=0, y=15):

I dont know where the (x=0,y=15) is from.