@JenniferStrasse ...
Thanks for sharing the code. I am not able to see many of the images within your tables because they are located on servers that I don't have access to. Not a big deal, though. I looked at your code, and I *think* this might be the issue...

If you take a look at the highlighted text in line 9, that code isn't found in lines 6, 7, or 8 (which I assume are the other buttons to the left of "Reassessment Policy". You might also try removing the yellow highlighted text and move the orange (non-breaking spaces) up to where that yellow text used to be. Essentially, maybe try to make line 9 look more like lines 6, 7, or 8.
You might want to try all of this in a separate non-published page in your course...something that only you can see. Once you know it is working properly, then you can paste the corrected page into your actual page that you want students to see in your course.
Keep us posted here in the Community...thanks!