Not sure if i've seen any files like the second ones or not, don't pay attention to the names that much, however i always use imgburn no matter what. If you don't mind possibly getting a coater i would try image burn on the other file type as well.
I'm not sure, I don't ever use clonecd, but there is another forum on here more dedicated to media and burning. Maybe over there they might know more about your specific problem, also what exactly is wrong w/them. Is the burn failing? or are they not recognized by the 360? I suppose its possible you have bad images are you checking them w/ dvd mulleter or xbox backup creator (the images themselves)?
