Currently, for store using the legacy CMS, legacy template and shelf controls are not adjusted if the SKU has a unit multiplier.

For instance, if you have an item with an unit multiplier of 2 and a installment controller, the data displayed on shelves will only show the installment options of a single unit, instead of adjusting for this configuration.

1 - create a sku with an unit multiplier 2 - set up installment options for it 3 - set up a installment related controller, such as $product.InstallmentValue 4 - the displayed data will be relative to a single unit, only.

implement a front-end customization to overwrite the original data being shown.