List of Datasubset

Why is my queryEntity pulling back as type "List of Datasubset" rather than a singular Datasubset?

a!queryEntity(
entity: cons!ABC_PROCESS_DSE,
query: a!query(
selection: a!querySelection(
columns: {
a!queryColumn(
field: "taskId"
),
a!queryColumn(
field: "stepDesc"
),
a!queryColumn(
field: "taskDesc"
)
}

),
filter: if(
isnull(local!taskChoiceFilter),
null,
a!queryFilter(
field: "ptaskDesc",
operator: "includes",
value: local!taskChoiceFilter
)
),
pagingInfo: local!pagingInfo
)
)