Flaming arrow line of spells missing since update?

[Fingel]

Hello. I few weeks ago I purchased spell: Flaming Arrow from Pathfinder Arelat in PoK. It is a ranger useable spell at lvl 29. Now I just reached level 39, and I wanted to buy the next spell in the line, Burning Arrow, however Arelat doesn't have it or any of the arrow spells. I heard the vendor database got changed around a little bit, what happened? Apparently Burning Arrow is not available anywhere in game anymore, but Flaming Arrow is dropped by Arelat? Sounds a little funny to me. Is it possible to get the line of spells back?
Thanks.