LH lower rail hole on top too big for bolt and sleeve

I have a question about the LH and RH lower rails. I understand from the instructions that the LH lower rail should have the big hole on top and the left side of the rail has the 3 small hole in a row. And the RH lower rail has the small hole on tip and the three small holes on the left. My question is that during assembly the instructions show one sleeve going down from the top into that big hole with the long bolt. But the hole is much too big for that sleeve and bolt. If the instructions didn’t show otherwise, I would just move on but I don’t want to just keep taking the frame apart just to fix something I might be able to fix now with some help and explanation. The RH Lower Rail with the small hole looks as it should to me.