How can I fix spacing issue in Word?

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I am formatting a manuscript in Word. What I want is to have even amount of space between the first line of text and the header AND the last line of the text and the footer. My text is justify aligned and I use auto hyphenation to create more even spacing between words in a line. With all these settings there are some pages where the last line of text has more space between it and the footer than it should, which doesn't look good or professional. I thought I can just move the first line from the next page to the bottom of the previous page and that would solve the problem, however, trying to do that the line doesn't move to the previous page. Do any of you know how to fix this issue? I've attached a screenshot of two pages in a doc showcasing this. I did not want the actual text visible so put a gray box around it. Hope you guys understand what I am saying.