Inconsistencies in Counting Overlapping Synoptic Stories

A side note to the previous posts on how best to graphically display overlap among the synoptic gospels. When we are using the pericope/section/story/number divisions as provided in the Aland Synopsis, I ran into places where I was having to make a judgment call in how I counted a section. What that means is, my resulting data was not above reproach. It would be simple if the gospel sections were all in the same order, and all discreet sections. Where an outline would be:

§	Matt	Mark	Luke
§1 Birth	1	-	1
§2 Baptism	2	1	2
§3 Healing A	3-4	2	3
§4 Healing B	5	3	-

But that's often not the situation. Because they occur in different order, sections in Aland are repeated, in particular, they are repeated each time that collection of verses occurs in the order for a given book. We even have a couple stories that occur in three different places in the triple tradition. Sometimes this is innocuous.
The Parable of the Great Supper that is in Matthew and Luke shows up twice in the synopsis and both times with the same verse reference:

§	Matt	Mark	Luke
§216 Great Supper	22.1-14	-	14.15-24
§279 Great Supper	22.1-14	-	14.15-24

The bold indicates that this is the place that it occurse in that books order. Luke's §216 occurs before the parables of salt and lost sheep. In Matthew, §279 is well after that, in a completely different act of the book. No problem. But one must use a consistent method so that the results are repeatable, because sometimes it's tricky.

My method for listing "which gospel sections overlap with sections of another gospel" has been:

1. note the bolded sections in Mark, counting whether that section is also in Matt &/or Luke
2. note the bolded sections in Luke that aren't also already bolded sections of Mark, counting whether that section is also in Matt or is stand alone, and
3. note the bolded sections in Matthew not already accounted for that don't have corresponding material in Mark or Luke and count them.

A synoptics person might say, Mark sections, plus Luke's Matthew and Luke's sondergut, and Matthew's sondergut.
I also do it again switching Matthew's and Luke's place for comparison. And that's where I get most of my problematic results.
As one example, look at the The Women at the Tomb and Jesus Appearing to the Women.

§	Matt	Mark	Luke
§352 The Women At the Tomb	28.1-8	16.1-8	24.1-12
§353 Jesus Appears to the Women	28.9-10	-	24.10-11

When I'm trying to count how many pericopes/sections/stories/numbers overlap using the Aland divisions, I will get a different result depending on my method. In my first count, looking at bold Mark, then bold Luke, then bold Matthew, I will get one less Matthew and Luke count than when I prioritize Matthew's divisions before Luke's. This is because the same story is broken into two sections in Matthew, but remains as one primary section in Luke, according to Aland's method.
Of course I'm tempted to count them both no matter what, but methodologically, that's problematic since I'm not counting stories like the Great Supper twice.
This issue introduces subjectivity and bias into the procedure. I can't just make it up as I go along. This is one of the reasons that using Aland sections as a datapoint for this purpose falls short. Aland was set up to be descriptive of each book's order and divisions, and include it all. It was not set up to ensure 1 to 1 parity between content.

To further illustrate the flaws in what I'm doing, Goodacre (and Larsen) find 107 overlapping pericopae between Matt and Mark. My tables have 106 sections. They both have published books and I haven't, so I yield to their intelligence, but in looking over, I can't even see what I'm missing.
My sections are:
Matt and Mark only: 34, 130, 147, 148, 151, 152, 153, 162, 272, 275, 342
And Triple Tradition: 1, 13, 16, 18, 20, 30, 32, 37, 38, 40, 42, 43, 44, 45, 46, 47, 48, 49, 117, 118, 121, 122, 123, 124, 125, 128, 136, 137, 138, 139, 142, 143, 144, 146, 150, 154, 155, 158, 159, 160, 161, 163, 164, 166, 167, 168, 251, 252, 253, 254, 255, 262, 263, 264, 269, 271, 273, 276, 278, 280, 281, 282, 283, 284, 287, 288, 289, 290, 291, 292, 293, 294, 305, 306, 307, 308, 310, 311, 315, 330, 331, 332, 333, 334, 336, 339, 341, 343, 344, 345, 346, 347, 348, 350, 352

Unless they are counting the long ending? Still, the big issue is between Matthew and Luke, and my counts are different from theirs.

Having said that, when our purpose is inputing the data into broad-stroke Venn diagrams, a few differences in data points won't even perceivably alter the graphic.
Arbitrary decisions on how you decide to display the data make a much bigger impact. I hope to post on that in time.