So that explains it.....

I just filled both bird feeders a couple of days ago, and noticed the bigger one was going down a lot faster than normal. I thought there was an influx of birds because I just knew the squirrels couldn't get to them; I made sure of that when we bought them......

They are very crafty, and I see my error. I put the little baffle on the big feeder. It didn't take this little guy long to figure it out!