User blog comment:Tommyboy97/Survivor Mega Elimination Table/@comment-1827503-20121020182121

Fun fact: Prior to Gabon, no original tribe had a lead post-merge and saw it turn into a deficit, if one does not count 1-0 as a deficit. (For All-Stars/Panama/Cook Islands, I'm counting the two-tribe stage as the original tribes.)

Gabon was the first time it happened, with Fang up 5-4 and the final 3 consisting of one Fang and two Kota members. It happened again the following season (Timbira led 6-3 and it became a 3-1 and then 2-0 deficit)... and then for a third straight time in Samoa, as Foa Foa came from 8-4 down to 4-1 and then 3-0 up.

Outside of the three-season span from Gabon-Samoa, it has never happened.