Before reinstalling, I suggest you try two things.
- Boot from the USB and run Bodhi from it. Do your normal stuff.
- Verify the new ISO by running a chksum on it. By 'new ISO' I mean get the 32bit ISO from sourceforge, and verify its integrity (it is after all huge download and this critical step ensures the file arrived intact). Burn a new liveUSB using the dd command, which can be found in this forum. We are wary about using unetbootin, and recent posts explain why
Your original question what have I done wrong here, I would question Install a different version of GRUB <---what were your reasons for ditching grub from the package, and where did you obtain this
edit: added a response to original queryGo to the full post