Actually, I think in the book that Tracy suggests doing bottle first, then followed by solids an hour later.
I personally don't do that, but I do feed bottle first at breakfast, then solids. Then the rest of the day I do solids first, then bottle.
You might try feeding solids (or bottle), and then waiting 30 min to 1 hr, and then trying the bottle (or solids - whichever one you didn't do). Some lo's just fill up on one or the other, and then don't want anything else for a while.
I've also taken to giving Ethan solids at 6 pm, then we go for our evening walk, then come back and give him his bottle at 7 pm. He eats a lot more solids that way, and then will finish most, if not all, of his bottle.
Good luck!