Yes they will be back there,Those mistakes are made,That's called the learning process.
I did something simular about four year's ago.
I had been roosting the birds for four days,But the nite before I didn't get out there.When I went out the next morning I set up in the dark,When Day started to break I noticed I was sitting directley under the bird's.
They had decided to roost in different tree's
All you can say to yourself is OOooooooooK now what.
Go back the next time and do it right hopefully