I have been trying for a very long time to figure out how to do the same thing. Like you, I just had to make sure when printing not to add the unwanted page to the printer list . Today I made a TEST document with two pages full of gibberish, so as not to ruin a good document. I found TWO very EASY ways to delete an unwanted page.
Method 1-is go to the first GOOD page… put cursor at the very LAST space on that page and hit CONTROL DELETE. Second page disappeared!
Method 2 -put cursor at the very FIRST space available on the page you want deleted and again hit CONTROL DELETE. Page disappeared! Works for me every time!
HOPE this works for you as well.
Now, MY PROBLEM is finding an easy way to ADD a page. No matter what I read about and try, unable to accomplish that task. I just keep hitting ENTER button until it brings me to a NEW page but there has to be an easier way. In the scheme of things, small problems, but annoying just the same. Good luck.