Very confusing system method description.
You mentioned :-
Column
Dozen
Streets
Splits.
Without an articulated example I have no idea what the bet is.
it should be SPLITS, not STREETS. :s SORRY!
progression
2 splits 1u
4 splits 1u
6 splits 1u
8 splits 2u
10 splits 4u
12 splits 12u (x*3)
14 splits 48u (x*4)
OK, for an example number 1 hits;--
then columnstreet 1-10 would be bet; (split 1-4 & split 7-10)
next number 14 hits; (keep the first bet) and then
columnstreet 14-23 would be bet: (split 14-17 & split 20-23)
...and so on...