At the beginning of 1918, remmington changed the date to 1918 to indicate the year of production. The goverment made them change the marking back to 1917 to indicate the pattern. This makes them much less common. Many bayonets went to britain with the 1917 enfields they purchased in 1940. These were put into british type scabbards that require the use of a frog to mount it on the belt. So there is nothing wrong with your setup.
john