2.7 million isn't exactly completely wrong, but I agree that it is not the information a user would be after. It is curious how wolframalpha.com interprets the query correctly but Kagi Knowledge gives the answer in ms.
2700seconds
is also incorrectly interpreted in the second example you posted as 11m 40s is equal to 700 seconds, meaning that the first digit of the query is being dropped for some reason.