No clue! Could mean the employer has a pay range or scale for that particular position and you would come in at 75% of the maximum pay with your years of nursing experience. Isn't it amazing the questions we think of afterward? I came away from a meeting a few weeks ago thinking I'd gotten my questions answered...until I talked to my husband about it and he kept saying things like What about this-and-such? What did they say about blah-blah-blah?
Everybody tells us during interviews to call with any questions, so I would. I would email my thank you for the time you spent telling me all about the position. I appreciate your offer to give credit for my years of nursing experience when calculating a salary...yadda, yadda, yadda. If the $$$ is right, doesn't really matter to you how they came up with it, I reckon.