The pins for a 66 block are numbered from top to bottom (Hint: The top has the screw tab going left and the bottom has the screw tab facing down.
Typically the instruction to use pins 1 & 26 are refering to the first pair of a 25 pair amphenol connectors (RJ-21x) and not a 66 block. Pins 1 & 26 are really the first pair (White/Blue) which sit side by side, pins 2 & 27 are the second pair (White/Orange), etc. The numbers of the an amphenol connector has nothing to do with the pin numbering of a 66 block.
Joseph Golan, RCDD