Try flashing the first file again and after it go through allow it to boot up even if you need to do a battery pull. Because there are a couple of reasons you would be stuck at the bootloader:
1) battery is too low to boot up (you will bet a low battery in the bootloader
2) the file you downloaded to flash is corrupt, its rare but it has happened a few times when you download a file it gets corrupted the fix was to down load it again (but normally it will say corrupt in bootloader)
I am guessing that you need to flash the first one again then get beyond the bootloader before flashing the second one. I have used the first one and booted all the way up before flashing the second.