The difficulty is that you have a character that completed the Lone Lands before the Eglain faction arrived. You missed out on a lot of the reputation because you did not get credit for all the kills.
Originally Posted by c0c0c0
It seems like some of the quests were versioned. Replaced with new updated quests. You did the original quest - you did not get the reputation points. The version you and I completed never awarded reputation points. We can't do the replacement quest because we did the older version.
You will have to go back to Lonelands. Find all the quests that you can do. They are scattered around. It can be very difficult to find them because the supporting sinew - the vector quests are not fully available. I would suggest finding a guide on Lonelands. Spend the time to compare your log of completed quests to all the available quests. Do all those quests like the bounty quests.
You will still be faced with repeating GA. Crafting stuff for the NPC in Ost Guruth. Random murder of qualifying locals. I would have made a decent number of points I got reputation for all the killing while doing the slayer deeds in Lonelands.
Unless stated otherwise, all content in this post is My Personal Opinion.