Mandatory information about my setup:

Have I searched the tickets before posting? yes
Have I searched the forum before posting? yes
Have I read the documentation before posting (which pages?)? yes
Joomla! version: 3.3.1
PHP version: 5.4.21
MySQL version: 5.5.37
Matukio version: 4.2.4
Direct link to the page that shows the issue: http://www.censere.com/dev/index.php/en/training/event/0/38-training/1-test-event


Description of my issue:

I have set up a 10% discount for earlybird booking. If works when selected on the booking page, but when making payment using all methods, it reverts to the non-discounted price.