Thanks man! The first two pictures are of a Buthacus arenicola (Egyptian green scorpion), the second set of pictures are of an Androctonus australis (yellow fat tail scorpion (4 instar)), and the third picture is of a Leiurus quinquestriatus (Death stalker) which is in it's third instar. They do look like Bark scorpions to me as well, They are of the same family Buthidae.
I must say that the website you speak of is excellent and has a lot of good information for hobbyists/ researchers like ourselves. Unfortunately I had a disagreement with a member leading to my ban.
How many emperors do you currently have? Im sure they are some respectable specimens.