[GAP Forum] WHY ARE GROUPS REPEATED ?

[abdulhakeem alayiwola]

I got structure description of all Subgroups of A:=DihedralGroup(8); as

gap> List(A, StructureDescription);
[ "1" ,"C2", "C2","C2","C2","C2","C2×C2","C4","C2×C2","D8" ] but i see that
"C2" is repeated five times and "C2×C2" repeated twice. I need explanation
on the above. Thanks.