Don't feel alone. Mine is doing the same thing. She has been broody for three days now, Yesterday she set on the nest and three fake eggs all day. Last night at lock down time, she was off the nest and on the roost. I took her down, showed her the eggs again and she plopped right down on them. An hour later, back on the roost.Now she's back at it...lol. I'm just leaving her alone for now.
I figure either she will or she won't. Given that she is a first time broody, anything goes. Usually when my Buff O's go broody they mean it but this one is breaking that rule.
It's kind of like a woman being 'a little' pregnant. Either you are or you aren't. Right now she aren't, LOL!