Reported this bug through chat. After fighting with Joshua to have him verify on his end, he confirmed this is happening. He then insisted I take screen shots while he ended the chat. Further chats have been more of a waste of time, and the phone number has a 2 hour wait.
I have verified on multiple accounts, web browsers, and even computers.
It only happens on for Weight and only on the 7-day view, as this is the only view showing day of the week names that I have found experiencing this issue. Though given this is one of the few remaining pages on a different style it could be caused by many of the upgrades to the backend.