Question On Tristan WWF Issue

Csn anyone tell me anything about the Tristan Worrld Wildlife Fund issue of 1999 with an extra black WWF Panda logo on the 5c stamp (Scott #632) (more specifically the 8th stamp in the minisheet of 16). All I know is not all the minisheets have this and what I don't know is if it is a positional variety (assuming there were more than 1 M/S in the press sheet) or if this is some type of funny business. Sorry I don't have an image to show.

*** Moved by Staff to a more appropriate forum. ***

ooops, this was supposed to go in the Modern folder and I don't know how to move it.

For those interested, the stamp can be seen here: http://www.wwfstamp.com/shop/en/WWF...ross-MS.html

http://www.oocities.org/dubrovnik_2...tristan.html

27 Apr '99 WORLD WILDLIFE FUND
An attractive four stamp issue depicting the Wandering Albatross: Diomedea exulans. All the stamps carry the WWF logo. The 4 stamps are also available in a sheetlet of 12 costing 1.60 pounds. The fourth stamp in the second row has an extra panda printed on it; therefore, we had a reprint of the sheetlet. Both of the sheetlets are for sale.
Values: 5p 8p 12p and 15p
FDC: 65p

KGB - thanks