i just tried that… i did it twice with the work print and the vol 1 and i tryed selecting blue ray and avhd but they both came out as a M2TS file…
well it will be an M2TS file, but it is contained within a set of folders ( BDMV, Certificate etc) that is the structure of the blu-ray/ AVCHD. You have to burn all those folders to the blu-ray.