Invalid error logic and logging

I can split into multiple issues if that is preferred but these seem somewhat related.
1) 301/302's aren't treated as successes.
- I've added two new options in the list
2) Count on $purge_errors was called twice
- I removed the second call so the correct number of errors is now displayed in watchdog
3) If an error occurred, all successes were also getting thrown to the watchdog error list making it hard to determine what is the actual problem.
- I've split the log messages into two different array lists