Like I said, the other monks only found some of the problems in your script. Your script counts errors that aren't for "Handling NSPAdvice for mechanism [4]".

For example, for the following log, your script counts two errors and mine counts one:

...Handling NSPAdvice for mechanism [4]...
...Authentication mechanism returned [3]...
...Handling NSPAdvice for mechanism [5]...
...Authentication mechanism returned [3]...
[download]

This is a symptom of your inner loop not exiting before the end of the log file (the second bullet in the grandparent post).