Sounds to me to be a combination of a few things.

Bait - is the corn and corn gel naturally there? I can' t bait by law in my area, so no experience there to help you with. But I would say that they know when something is different be it pile of corn or unfamiliar sites and smell etc.

New scent/site - Leave the blind out let them get used to it being there. Racoon urine are there lots of coons in that area? remember that a drop will do most cases they have sensitives noses. Surely they are picking up on a over abundance of coon urine. As it gets later in the year buck urine and does estrus are good choices. Buck urine should help in pre-rut as bucks disperse and establish their areas. Doe in heat(estrus) should be great once the rut is on. DUmb buck smells hot doe and comes to take care of business.

You are seeing deer so with some luck and fine tuning you should have some success. Be careful of the wind and go easy on the unnatural scents.