Do discount modules run when editing an order in admin?

[Bruce - PhosphorMedia]

I don't know if this helps, but the built discount modules (at least quantity discount) does recalculate based on Admin Edits.

[Kent Multer]

I have a client who often needs to modify orders on the admin page after they're placed. Her store is running a custom module that applies some unusual discounts. It's an older module that generates BasketCharges instead of using the new discount-module API. When she edits an order, she often has to manually recalculate the discount.

My question is: if I update the module to use the new API, will this eliminate the need for her to manually adjust the discounts? Will the store run discount modules automatically when she edits an order?

Thanks --