Ok, I believe I have a bug report:

1)Every time I reboot, the only way to be able to mount by "loop" is first running sudo debian. I don't know why;

2)The only way to run debian-lxde is by first mounting the partition (in my case, mmcblk0p5) to /.debian;

Now I just need to mount using event.d files to be able to run lxde (so I don't need to manually mount every time I run lxde), so, at least for now this works for me.