Achievements: Goat Roped (completed March 7th), Nagato Makes Moving Easy (completed some time in February).
Waypoint stats show both completions under 3 hours. Goat Roped was mostly coop, except for The Library, and Nagato Makes Moving Easy was entirely coop. I have tried all of the suggestions such as replaying levels, making sure to have a time recorded for every level in single player and coop, watching prologue, restarting xbox, viewing achievements in the service record area of MCC, opening level selects and playlists. Nothing is working for me and I have ran out of ideas. Other achievements are popping but not these two.