This GW thread might help explain what may be going on:
http://forums.gardenweb.com/forums/load/fig/msg1008532931790.html
"I looked up this fig on the internet. In this book,
THE FRUIT MANUAL a guide to THE FRUITS AND FRUIT TREES OF GREAT BRITAIN; (Hogg) I found the following:
BORDEAUX: Aubignon, Aubique Noir, Aubique Violette, Figue Poir, Petite Aubique, Violette, Violette Longue, Violette de Bordeaux, Nagronne (sic)
Fruit: Large, Long, Pyriform, marked with Ribs. Very much flattened laterally and one side of the apex hanging down more than the other. Skin quite black covered with a fine blue bloom and when dead ripe cracked with white longitudinal lines. Stalk very short, eye open, flesh pale coppery colored, very tender and juicy, sugary and sweet. Excellent:"
My second season crop fits this description completely.
From another thread, our own Jon weighs in re Petite Negri:
http://forums.gardenweb.com/forums/load/fig/msg0606184416481.html
"{Petit Negri] Could actually be one of several different varieties, as well: Violette de Bordeaux, Negronne, etc. There seem to be varying reports on its growth and fruiting that are not consistent."
The early season crop on my tree was a lot smaller and uniform in shape:

One more quote:
"There are two types of Aubique fig cultivars. One is the larger fig known as "Aubique" (AKA Abicou) which fits Hogg's description above. The other is a smaller fig known as "PETITE Aubique" (means Little Aubique). Petitie Aubique is the same or very similar to the cultivars Negronne, VdB, and Beer's Black."
Perhaps Petite Negri is a Bordeaux variant behaving differently depending on first/second crop, location, zone etc. etc etc.
Whatever the answer, I am glad it it is part of my collection.
Frank