You may also want to check the contract. When I was still working for the Dutch companies of an American mother company, quite a few American colleagues complained that their hours would be rounded on a day-to-day basis. So everything less than half an hour was rounded down, which was the most common case. Because the company would also round up if it was over half an hour, legally they were in the clear.
The supervisors however had strict instructions to make sure it never (or hardly ever) happened that they had to round up.
Upvoted, saw that added 1 cent, hope this takes some of the pain away ;-)