Assessment - Content issues

Below are the content issues:

1) Natural Disasters Course puts many of their content headers into its own unit, which doesn't render well in the mobile app (since they are shown on multiple pages)
https://courses.edx.org/courses/McGillX/ATOC185x_2/1T2015/courseware/3dfd86b797d448b986296fdab9f79158/3053a632e5ef451c8255543ba041b0b8/

2) In 'Greatest Unsolved Mysteries of the Universe', in 'Any questions?' after intro, there's a calculator icon in the bottom right. Clicking it opens a field for entering calculations. Pressing 'i' overlays what looks like some help text that isn't fully visible.