Fillets are tripping me up

I'm not sure why my 1 minute part is tripping me up, but I can't get a proper fillet on it. It's just a thin extrude and then another extrude to make a flange. I would like a fillet where they come together, but SW won't do it right. It thinks this has two bodies, and it won't let me combine them. Is the thin extrude doing something?

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