[FIX] more stringent check for putative duplicates; removes dups earlier
[FIX] more stringent check for putative duplicates; removes dups earlier

h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan,h-2/seqan