If they gave both Allegiance Dolls to the NPC, then they gave both Allegiance Dolls to the NPC.
She either got the points, then gave light dolls too, and cancelled them out, or only gave neutral dolls, thereby not receiving points from them.
As stated in the PM, they only give the points once per doll. You can't farm them doing it over and over.
Only other way to get Allegiance Points would to do any of the other quests that award them.
Some are briefly talked about here:, (though the list is a bit out of date)
http://pandoraonline.net/forum/showthread.php?tid=41
while any others can be found generally by searching "Allegiance points" on the Wiki.