There is an oddity with my collectibles right now. My first village I am still in need of a total of 3 collectibles; two bugs and one pebble. All of the puzzles have been completed, every tech has been researched, so it's just a matter of waiting. But the weird thing is I recently started another village and some of the missing items from the first village are appearing in the second. Some could say it's a coincidence, except I have yet to complete the puzzles and each technology is only at a level 2. But the most frustrating is when the collectible appears and you bring over many children and still it doesn't register as seen, and then disappears.