With all the eggs ive missed i wouldnt be surprised if i did. Just last week i was digging around my Gilleni enclosure and found a couple of old Ackie eggs. Same thing happened a month ago while digging up my Steppe Runners setup(two old ackie eggs) lol
Over the years based on what ive found after the fact id say ive missed around 3 Red Ackie clutches and 1 or 2 Yellow clutches.