They all won their last start at longer odds than they were at their 2nd last start???

They all had at least 33% wins and 80% placings?

Okay, you said there was no logic behind it. How about this one?

At their previous 2 starts, all of them started out of barriers next to each other, eg barriers 2 & 3 or barriers 7 & 8. Now that just makes no logical sense at all. Perhaps that's it???

I know nothing about horses, never seen a horse
all I do is collecting data, and visualize them

you can not use one variable, that is single sighted

just visualize the situation they are in
can not help you much

but I really appreciate your inputs

Yeh, like my garden is appreciating your outputs :)