9 eggs in one week, sounds like two hens. they only lay every other day or sometimes 2 days, so in a week there should only be 4 at the most, but usually only 3. maybe i missundestood. were they laying at the other home?
ok i read your post again. last sunday till today is ten days, still too many eggs. ten days should only bring 5 eggs at the most.
same sex birds ( or any other animal for that matter ) will have sex play, and some times will reverse roles.
you wont notice and veins by candleing for several more days.