Highlighted text displaying as the same color (should be multiple colors)

To give a quick background, I have a Python script that does some highlighting to a PDF document in various colors. I know the script works because I can view all the colors in the PDF on my mac in the Preview app. However, when I open the PDF in Acrobat in Windows all of the highlights are yellow. The strange part is that when I right click the highlight and go to properties, the color is correct. Is there some sort of setting to fix this?