I guess this PRNG has recurrence period much less than 52! (or wasn't seeded appropriately), so that only sampled a fraction of the distribution "... the syste

I guess this PRNG has recurrence period much less than 52! (or wasn't seeded appropriately), so that only sampled a fraction of the distribution "... the system ties its number generation to the number of seconds that have passed since midnight, resetting once each day, which further limits the possible random values. Only about 86 million arrangements could be generated this way,"