user the formula below which should work
=If Count(1) In ([Form]) > 1 Then If [Form] <> Previous([Form]) Then 1 Else 0 Else Count(1) In ([Form])
user the formula below which should work
=If Count(1) In ([Form]) > 1 Then If [Form] <> Previous([Form]) Then 1 Else 0 Else Count(1) In ([Form])