I have the same issue. This appears to be a bug.
$6500 loss in 2018. I go through the Capital Loss Carryover wizard, it says my carryover is $3500. When I get back to the income screen, it applies the $3500 carryover to 2018 instead of 2019 in the CLC row.
There is no way to manually override this.
Please fix this bug.
