Boot questions on duplicate kernels and defaulting to pinned kernel

Hello,

I have some questions regarding grub.

  1. I recently started pinning images. Is it possible to make a specific pinned version the “default” to boot?
  2. Related to (1) - can this be the “latest pinned” version? (As in, if I pin a new one, that becomes the default)…
  3. Why do all images appear “twice” in the grub boot loader (see screenshot). Is there some actual difference? If not, how can I fix this (not sure what I did to get them to duplicate).