Visa requirements change occasionally for countries, and more frequently for others. There are edge cases, events and more.
As a result, each of these companies or sites that track them may not have all the information. I like VisaHQ but it's not necessarily perfect either. They try their best, after all, it's in their best interest to be up to date and accurate, but stuff will be missing if they couldn't find it, or potentially out of date.
When it comes down to it, the most reliable means of finding out the travel visa requirements is from the country itself, or their embassy/consulate in your country. In your case, for example, you can contact the Embassy of Colombia in Romania.