Brian,

That's a total bummer about the warp. Impossible to say what exactly caused it, but there's a slight chance using wood glue was a factor. CA is instant and in terms of holding things straight it's more reliable - just because of the drying time of wood glue necessitates clamping/pinning/etc. longer.

I'll propose something radical. I've never tried this, I'm just brain storming. How about wetting it with water, twist it the opposite direction of the warp and have your wife blow dry it with a hair dryer. And if it takes out the warp, hit the joints with thin CA.

Just an idea.