I am referring to Winn et al. 2011
Last sentence of the first paragraph is
Although sampling bias against both selfing and highly outcrossing species may inflate the frequency of mixed-mating populations, the number of species reported to show mixed mating is not trivial, and calls into question the status of mixed-mating populations as transitional, and therefore the sufficiency of the theory to explain the observed distribution of mating systems in hermaphroditic species.
I do not really understand what is the logic behind the highlighted part and what is its purpose.
Is the number of mixed mating species supposed to be trivial in a case where the number is inflated (So there is a need to clarify it is non trivial)?
How does the fact that it is not trivial bring up the question below the highlighted part?