Its because they changed the heirloom of polearms from one set and put it on another but left it the old way ingame, so theres no such item as a heavy elegant poleaxe ingame, i could probably tell you what you need to put in the ingame files if that would work. upto you if you wanna try.
You could try going into Crpg folder and open item_kinds1.txt in wordpad
For Heavy that would be generation 1 so look for line
itm_imodbits_balanced_elegant_poleaxe Balanced_Elegant_Poleaxe Balanced_Elegant_Poleaxe 1 elegant_poleaxe 0 1415905284 4222124851990272 18039 8202 2.000000 100 0 0 0 16 44032 94 0 132 0 284 43
0
0
and change it to
itm_imodbits_heavy_elegant_poleaxe Heavy_Elegant_Poleaxe Heavy_Elegant_Poleaxe 1 elegant_poleaxe 0 1415905284 4222124851990272 7216 262154 2.000000 100 0 0 0 16 44032 90 0 132 0 284 42
0
0
If you try this i have no idea of the end result, USE AT OWN RISK
If admins don't want me to post this kind of stuff let me know, but you should really get round to answering these kind of issues :p