To clarify the points. The official trainenquiry site has several train schedules where the stations are mixed up because of similar sounding station codes. For example this train passes through TUVR (Turavur), but the official site has an error, wherein it says it passes through TUV (Tuvvur). That is just a genuine mistake on that site.
The speed calculation is automatic based on the distances. Since Tuvvur is several hundred kms. off the train route, if the train actually passes through Tuvvur, the speed of the train has to be 230+km/h.
Now, the...
more... original mistake has been corrected on this site - train passes through Turavur/TUVR, and hence speed has dropped to a more realistic level (41km/h).