Is there something on the top half assembled wrong, so that when you put the two halves together, something is holding the float down a bit?
Or maybe the float level adjustment is set too high and the body of the carb pushes the float down where it is supposed to run, but now the valve is open? When the bowl is off and you hold it upside down, the float should be roughly parallel to the top of the bowl (Which is upside down at this point.) Is that clear as mud?
Long live American manufacturing!
