i came across this inconvenience.
if you want to burn a Dual Layer DVD or an Disc Image (the Disc Image i did) a DL disc must be in my burner, if not only a single 4 GB allowed and the adjusting to fit options was restricted the Standard or Long Play (and TV systems) but when a DL DVD was inserted the adjustments could be performed and then the Image Disc could be created.
* not sure but i think i did it eject the disc not long after the Disc Image started (and was successful).
unless i didn't see an option which took into accounted for a DL disc.