Adobe Portfolio responsiveness inconsistency with text boxes

Hello,

I have an issue where text boxes which are formatted exactly the same are functioning differently. I've set the width of boxes to 60%. Some, when viewed on mobile or when the browser is made narrower, are responsive and switch to 100% width (I assume this is the correct functioning). However, others maintain 60% width even on mobile or narrow browsers. I've attached a picture of the problem and the settings for both boxes, which are identical. 

An example of where this is happening can be seen here: https://aramarratoonian.co.uk/compass-resourcing where the first two title + paragraph boxes are always at 60% width, and the third box is responsive and adjusts itself to 100% on mobile. This problem seems to appear on any browser I try.

Does anyone know why this is happening or how to fix it one way or the other? I just need them to be consistent so my website looks neat!

Thanks in advance