dbs_bowsers_revenge_b7
db_bowsers_revenge_b7
are the same map with different names, the MD5 of both is the same.
dbs_nuketoss_b3
dbs_nuketoss_b6
dbs_nuketoss_rc1
b3 and rc1 are variations on the same map
b6 is an entirely different map. This is rather confusing, not sure what can be done about it though.
dbs_hotnuke_b9
dbs_hotnuke_rc1b
db_hotnuke_b5
b9 and rc1b are slight variations (I vote for rc1b if you consolidate) of the same map.
b5 is still a dbs map (not sure why called db) but is an entirely different map. Maybe slightly related, but so much smaller and enclosed rtaher than wide open like the other 2.