Question on Compensation for Cancellation

Flight PD297 YOW-YYT was delayed ~3hrs on 5/29 due to weather at the destination airport (uncontrollable event) before being cancelled and rebooked for the morning of 5/30 with the reason given being 'controllable event, crew out of position'.

This was marked on the Porter site, but has now been removed and there is no reason given for the flight cancellation/rebooking.

When I went to submit a compensation claim it was marked as ineligible saying the flight was cancelled due to uncontrollable events, but I filled out the form and uploaded the screenshot of the site showing the 'controllable event' tag.

Anyone know if there's any way to find out more information on the exact reason for the rebooking of a flight? I'm assuming the flight was initially delayed a few hours due to weather, but duty time limits resulted in having to rebook the flight for the next morning.

Any insight here would be appreciated!