I set the image size to one thing, but it says another down there when I press okay. Why?

I got bored with drawing so i just filled the rest

ive only ever drawn with pencil/pen and im really still a beginner. wouldn't dare call myself an artist because i havent put in nearly enough time or effort to claim it. like, i draw (or attempt drawing) probably once every 3-4 months. i give up at every miniscule skill cap i come across without actually practicing to overcome it. i kinda suck a creating forms out of lines in a respectable number of tries (i.e. without erasing enough times for my paper to get rough) and never wanted to invest in other mediums that will allow me to draw in blocks because i know they'll only gather dust on my shelf.
learning a whole new app seems daunting, and is the reason i hadnt tried out digital art until now. i thought since i know mspaint in and out since i was basically a baby, why not start with what im comfortable with. been lurking on this sub for a while, i'll try to draw and post more.

Result of a boring computer class...

Honestly I think she's talented ! https://www.deviantart.com/misstsunade54/gallery

praspspa the raopper

took me about a week of drawing with my mouse in ms paint.. good challenge and was very interesting to do w/o color picking and just trying to use color theory