There used to be only 3 positions spoken of: 1st, 2nd, and 3rd. The only one that was correct was the 1st (being the primary key of any Cajun accordion). ie: most popular Cajun accordion is a "C" accordion whose primary key on the push is "C".
Positions or Keys (any Cajun accordion)
1st position = primary key on the push
2nd position = blues key pattern (rare)
3rd position = trinity pattern(rare)aka "The Holy Trinity" named for the 3 repeating push chords on any Cajun accordion. On a "C" accordion the trinity is the "E" chord
4th position = the backside pattern. Used to be the 3rd position
5th position = on the pull aka "In the 5th". Used to be the 2nd position
6th position = gypsy key pattern, the Mardi Gras song pattern (rare)
FYI...Jim Pettijohn aka BmoreBusker is attempting to show some of these chords and positions on youtube as of late. Could it be that he has read and understood my discoveries and declarations and is now using them to take a couple steps up the ladder of hierarchy? Why sure he is. Right Jum? Thas mah boy! LOL, I think he hates me.