Quantity plugin / amounts price update

[zebrafilm]

Just bought the quantity plugin from the extension market. In general
it works although the DOCS are not very clear. There is at least one more field (Dimensions unit) in the plugin that is not mentioned in the Docs.....

My main problem is that when people enter a different amount on the detail page, it is not reflected in the price. Only at adding / opening the shopping cart it shows the discount.
I think that when people adjust the amount of items, the price should reflect this asap and so should the discount. It does so when I have custom fields that add a certain amount, so why not with the Amounts?

Bastiaan