I am not that big a fan of "Occam's Razor", but it
is definitely a good idea to stay away from exotic explanations
like "DIMINISHING PROBABILITY" until you have investigated
the everyday normal ones such as "BASIC PROBABILITY".
What I mean by that is that in Spec 7 games the basic probability
of post 1 or 2 winning is about 1 in 6.1 games. If we simplify
things by imagining that all the games are Spec 7 (close enough)
then the chance of post 1 winning 2 games in a row is (1 out of
6.1) x (1 out of 6.1) which is 1 out of 37.2. By the time you
get to 6 in a row, you are up to 1 in 51,520.
My database of Dania results from May 2001 thru June 2012 contains
only 57,653 games in total, so I think you can see the problem.
Just getting 7 in a row once in 10 years is looking iffy. And
if you are counting on post 1 winning all 13 games, that works
out to about a 1 in 16 billion chance.
Even if they had 400 performances per year, they would have to
keep going for about 40 million more years for 1-1-1-1-1-1-1-1-1-1-1-1-1
to be a fair chance of happening.