3050 small screen printer print twice,how to fix it?

3050 small screen printer print twice,how to fix it?

As the picture shows.

The small screen printe using this kind of control pannel can print twice at one time without upping the screen frame.

Let us do this step by step;

1. pust the start,let the machine start to print;

2. pust the "print 1/2" when the machine moving;

3. then the machine will start print twice;(2 coating)

And how to change it back to print 1 time;

Do the step as above;