Try inputting the sheet name as: 'Data'!H58:I66

This will help Google Docs recognize that the data is actually on another page.

If you make a copy on your own account you should be able to see and edit everything sinces theres multiple formulas.

@Aelendil

Okay, I think I've sorted it.

F11 should be:
=IF(ISERROR(D9),"Choose Enchant",IF(C11="Choose Level","Choose Level",IF(C11="Choose Status","Choose Status",IF(D13=0,"Choose Quality",IF(D13=1,VLOOKUP(C9,Data!$AA$5:$AV$40,MATCH(D11,Data!$AA$4:$AV$4,0),FALSE),IF(D13=2,VLOOKUP(C9,Data!$AA$44:$AV$79,MATCH(D11,Data!$AA$43:$AV$43,0),FALSE),IF(D13=3,VLOOKUP(C9,Data!$AA$83:$AV$118,MATCH(D11,Data!$AA$82:$AV$82,0),FALSE),IF(D13=4,VLOOKUP(C9,Data!$AA$122:$AV$157,MATCH(D11,Data!$AA$121:$AV$121,0),FALSE),IF(D13=5,VLOOKUP(C9,Data!$AA$161:$AV$196,MATCH(D11,Data!$AA$160:$AV$160,0),FALSE),"Err")))))))))

D13 should be:
=IF(ISERROR(MATCH(C13,Data!$I$51:$I$55,0)),0,MATCH(C13,Data!$I$51:$I$55,0))

D31 should be:
=IF(ISERROR(MATCH(C31,Data!$I$51:$I$55,0)),0,MATCH(C31,Data!$I$51:$I$55,0))


I have no idea about enchanting so cannot confirm whether the figures it's producing are correct.

Hope this helps and let me know if you need anything else

@Aelendil

No worries, sometimes it just needs a second pair of eyes.