The following is an explanation by the tool maker of having multiple warnings at the same line.

The reports actually have no duplicate entries.

For example, in the report of Dovecot, weaknesses 0 and 1 are raised at the same line.  So they look duplicated, but at that line, there are actually two buffer accesses.  And each buffer access is reported as a different weakness (weakness 0 and 1).  Warnings 4 and 6 are the same.

By default, our tool differentiates such cases by distinguishing column information.  But, current column information is not that accurate to differentiate two expressions that are so closely located at the same line (like the above Dovecot example).
