Taxes seems to be rounded to nearest integer

I have configured MarketPress to use the Swedish value added taxes of 25 %. For an order of say SEK 2.00 that would give a tax of SEK 0.50 and a total sum of SEK 2.50. But MarketPress shows it as SEK 3.00. Is there a way to get MarketPress to behave correctly?

Screenshot of order status page:

https://www.evernote.com/shard/s1/sh/43b8fea0-5de6-471c-be4f-652e1bf135e2/dd27537d14f3bb78921614c37d2d049c

Screenshot of MarketPress settings:

https://www.evernote.com/shard/s1/sh/de762216-7eae-4206-ac06-0605c1d25032/7ac9bdb969701d77a3c561addcc02756