Upfront Spirit -> Product Page Menu Inconsistancies

Hi There,

I am getting an inconsistant display for the menu on SPIRIT theme on SINGLE PRODUCT PAGES in Marketpress. Hoping this is a quick and easy fix?

I have tried removing and re-adding the menu to the page, but other than losing all my custom styling, this had no effect. Please let me know if you can point me in the right direction to fix this issue.