Which image? The one you’re tagging with the markers, or the end result? If the final result after you’ve been through the process is upside down, you tagged the markers out of order. If the preview or un-warped image is upside down, that won’t hurt anything - could mean the camera is mounted upside down.
With the scroll wheel, assuming you have one. I don’t think anyone has ever asked about this before, and I’ve never noticed, but we don’t have a way to zoom that screen otherwise. I’ll have to add some zoom buttons.
With the alignment pattern, you get better results by scaling it up as large as you can - it looks like you could probably run it at 200% scale, probably 250%, and that will help the accuracy.