If I understand the translated cache description it's only allowed to use 9 caches and those should fill the whole D/T matrix. So one cache will have D1 and one will have D1,5 and one have D2 etc. And one cache will have T1, one have T1,5 and one have T2 etc. With only 9 caches that means there can't be any duplicates (like one cache being D1T1 and another being D1T2, because then you would need more than 9 caches to fill the D/T-matrix).