I'm assuming you meant to type: "When I go to clock/settings and attempt to change the clock from analog to digital, it sTays analog."
There's a clock app. It can be analogue or digital, exactly as "still1" says. There's also two clock widgets. They display in either analogue or digital on a home screen. Both widgets call up the clock app, and that app can be either analogue or digital, as "still1" says.
I reckon that you need to bin your analogue widget, and replace it with the digital widget. The digital widget will call up the same clock app, which can be either analogue or digital.
Phew.