Within the unit, follow the same paths to edit or remove payment terms. If you have two leases within a unit after selecting which action you want to take, you will be asked which tenant/lease this action is for.
If you want to edit or remove that future lease click on the three dots within the unit to select "edit payment terms" then choose which set of payment terms you would like to edit.
It's the same process for removing a tenant or ending a set of payment terms.
Choose to "remove tenant" then choose which "tenant or payment terms" you wish to remove.