I took my mid day tracking for each code and merged the two codes just like you would mid and eve draws. Now there are code variations in some of the numbers. I used the 256 mid code here for reference.

This is deflating the two codes

tier two will have the same 256 code on both sides.
tier one will have the 256 code when placed on the side it fits and also a second code for each number when when placed on the side it does not fit.

example the 467 in tier one
467 code 256 in code 2
467 code 566 in code 1

Tier 2
067(067) 078(078) 069(069) 089(089)
267(267) 278(278) 269(269) 289(289)

Tier 1
467 478 469 489 045 056 058 047 049
245 256 258 247 249

Input:
067 078 069 089 267 278 269 289 467
478 469 489 045 056 058 047 067 078
049 069 089 245 256 258 247 267 278
249 269 289

code 1
256__045,056,058,047,067,078
_____049,069,089,245,256,258
_____247,267,278,249,269,289

code 2

256__067,078,069,089,267,278
_____269,289,467,478,469,489

___________________________________________________

looking at the mid draw history of the 256 code It appears together on the same date on some dates and not together on other dates.

When they appear together at the same date what does that tell you.

Number search of SC3MID ev-od cd 1-2 new.dmg:
All Records      Printed: 12-27-2006

14 Records Found         
14 Selected Records Printed          Page

 Record    Date    Pos1 Pos2 Pos3 Pos4  Matched  Skips
----------------------------------------------------------
    13  10/09/2006  5    2    6            3      12
    14  10/09/2006  5    2    6            3      0
    17  10/11/2006  6    5    2            3      2
    18  10/11/2006  6    5    2            3      0
    20  10/12/2006  2    6    5            3      1
    21  10/13/2006  6    2    5            3      0
    25  10/16/2006  5    6    2            3      3
    31  10/19/2006  5    2    6            3      5
    51  10/31/2006  6    2    5            3      19
    52  10/31/2006  6    2    5            3      0
    57  11/03/2006  5    2    6            3      4
    58  11/03/2006  5    2    6            3      0
    65  11/08/2006  6    2    5            3      6
    107  12/02/2006  2    6    5            3      41