So this questchain you gather 4 tablets in Ashara: when you turn them in you get four delivery quests:
1) Delivery to Archmage Xylem - I turned it in in Azshara and got Xylems payment to Jediga
I went back to Jediga and got a lot of exp.
Then I went to Thunderbluff for 2) Delivery to Magatha - I turn it in but I can't get Magatha's payment to Jediga: It's grey and it says I'm not eligible to do that quest yet. This is a bug, since you need to be level 45 minimum (I'm level 50)
Then I went to Orgrimmar for 3) Delivery to Jesri'Mon and I got Jesri'Mon's payment to Jediga (so this one does work just as Xylems payment to Jediga)
Then I went to Undercity for 4) Delivery to Andron Gant - I turn it in but I can't get Androns payment to Jediga (same bug as in Thunderbluff: quest is grey and says I'm not yet eligible to do that quest)
So both Magatha's payment to Jediga and Androns payment to Jediga are bugged. When a player turns in Delivery to Magatha and Delivery to Adron Gant they should be able to get these follow up quests.
Could you fix this and let me know when it's fixed, they both give a lot of experience.
Thanks!