Your assignment to the %macro hash is over writing the last entry because $type is the same for item you want to add:

                $macro{$type} = { $var => $rval } 
                      if ( $class eq "macro" );
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should be

                  $macro{$type}{$var} = $rval 
                      if ( $class eq "macro" );
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You can also get rid of the temp assignment into an array, by doing this for rval:

         my $rval = [ split(/,/,$rval) ];
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