I use Toast 10 to burn blu-rays all the time, but I don’t use h.264. Instead, I make an MPeg-2 file in Compressor. Don’t look under DVD settings. Instead, go to Formats/Mpeg-2/Elementary Stream. Be sure to select Blu-Ray in the “Stream Usage” window. Take that into Toast, along with your audio file, and make sure you check “Re-Encode Never.” MP2 makes bigger files than H.264, but will be fine for a 2-hour movie.
I have a Pioneer burner.