Cordially,
There is an provable example of stochastic processes giving rise to increased order: the hardening of metal. By appropiate heating and quenching, one can adjust the crystal size in a metal, either increasing the average size (hardening) or decreasing it (annealing). The micro-level process is thermal, and therefore stochastic. The result is designed, so much so, that if one found either hardened or annealed metal in an excavation, one would immediately conclude that it was not natural, but part of an artifact.
My point is that "fitness" and "natural selection" are tautological concepts in standard Darwinism (and thus not scientific in the Popperian sense). It is in the missing "theory of fitness" that the order and law-like properties of adaptive ecology will reside, and once the laws begin to be uncovered, the rhetorical heart of Darwinism as an argument-from-no-design will be cut out. Stochastic search of a designedly constrained space of possibilities with a designed notion of fitness is exactly what the Darwinist's latest triumph, genetic programming, models. It is a good advance for evolutionary biology, but a blow against Darwinism-as-creation-myth.