I think I follow - you thought: http://www.tartanregister.gov.uk/tar....aspx?ref=5258 was the same as the kilt but now realise that the setting is wrong and that in fact the kilt is http://www.tartanregister.gov.uk/tar....aspx?ref=2382 other than you think the pale line in the kilt is yellow rather than white?

The kilt material is definitely the Glengarry setting but whether the line is white or yellow is not completely clear from the picture but as I see white in some areas, know how silk discolours over time and. most importantly, know that the sett with a yellow line is note previously know makes me feel that it's the Glengarry with a discoloured white. I look inside the pleats and/dye analysis would confirm this supposition.