Pet Journal Argent Gruntling and Dutiful Gruntling should be shown for horde character's only, because its not possible to get those with alliance character.

This is because Blizzard did not flag them as Alliance or Horde only items. Typically you learn the opposite faction item in this case so if you were to faction transfer you would not have to purchase it again.

I believe you can also purchase this on an Alliance toon and it grants credit too.