Hi,
After an hour work, I am able to patch it correctly. Now it should supposed to crossed the baseprice (priceWithoutDiscount) in any conditions. But i have updated lots of files. Instead of providing you the patch one by one here, i would strongly recommend you the download the template again from our server and re-apply it. Also the TUTORIAL.PDF (to show the crossed price section) has been updated.
pedroencabo the new version of the FashionMart template has been sent to your email address.
Basically the pricing section should have AT LEAST these options selected. Look at the screenshot. (You can select more than this, such as; TAX AMOUNT but you should at least choose those below):