I'm not 100% sure as I didn't yet have time to check that, but if it can help some of you to discern the different timelines, I noticed the pages for the events that could be confused with Gaku's timeline - or at least, the events around the freshmen insurrection period (or lack of insurrection for Gaku's timeline) - are differents depending on the timeline. The pages are plain white for Gaku's timeline (without the insurrection) but what is outside the panels is doted for the timeline with the insurrection.
Thanks for the chapter!