There is no login on a live CD - how could there. But the code for log in must exist on the CD to make it possible to install. So you have some odd bug.
Did you check the md5 sum of the iso?
If so, did you burn it really slow - as slow as possible (to reduce errors in burning that always occur)?
Remastersys is a subproject by fragadelic that makes it possible to make an iso from your install without your passwords etc
Don't fix it if it ain't broken, don't break it if you can't fix it