What does it mean? What do I do about it?
Blocks per Cluster > 1 are the hallmark of Type 2 Storage Areas. All user data should be in Type 2 areas.
Create a storage area design using Type 2 areas, then dump and load.
Use the data in rpt/area.rpt and rpt/tbl.rpt to help design storage areas.
See also Dump & Load Scripts (PAID).