Whom can help me explain the ‘46.06:18:08’ time. - response (3) by M.Saeed Khurram

Hi,
as gerado has explained that even with a format the underlying data type do not change and the resulting arithmatic is simple INTEGER arithmatic not the Time arithmatic. 
You can use the below query to find the time difference:

 SELECT TIME  '11:10:25'  - TIME '11:00:33' HOUR TO SECOND(0) ;