Hi, as you can see I have found some little seeds...

Thé last picture of week 8 is clearly showing us the pollen sacs of an hermaphrodite 😓 , concerning the others plants just check them to see if you can find some pollen sacs and if not the only issue could be that your hermies had pollinated your others plants and in that case your plants will produce some seeds but nothing that will harm your grow ( you will just have seeds ). Now your others plant can't turn hermies because it been pollinated : it will only produce seeds. An other solution could be to removed the pollen sac on the plants that are showing hermies signs to avoid a box full of seeds but you will be able to harvest the plant instead of get rid of it 😊👍