Schools and instructors love GI bill money; they soak it up like a sponge, and you may find that they milk it to get every ounce of flight time and money out of it that they can. If the school is jerking you around, they may be the only game in town, but you may be better off going to another town.
If they're playing this game now, don't expect it to get better. Don't expect great maintenance or instruction, too. A lax attitude carries over in all directions; if they can't manage their business professionally, consider it to be indicative of what's under the hood, too.