There is some post about it several pages back, the exact location is unknown. The problem appears to exist in all coins. I have tested the anomaly under a number of different parameters and the result is the same. There is a mathematics error in the code where essentially the mining  rewards continue to reduce by half even beyond the 8th decimal. IE: even after the mining reward is cut in half down to 0.00000001 it continues to half even though the result cannot be seen. Eventually this causes a script error, and causes the block rewards to start over from the beginning. The easiest fix is a manual entry to tell the network to never produce coins after BLOCK # "X" ("X" will vary based on how the coin is set up.) I believe this error will effect most (if not all)  current bitcoin altcoin forks.