Sand Patch Grade Timetable Totals

Sand Patch Grade offers 75 timetables according to the game

My game is telling me I have completed 74 of 75

But if I look under the individual locos I find the following

AC4400 has 57 timetables, all unique to the AC4400 57
GP 38-2 has 22 timetables, 15 unique to the GP 38-2, 7 that are duplicates with other locos 15
SD40-2 has 54 timetables, 1 unique to the SD40-2, the rest duplicates with other locos 1
C-40-8W has 48 timetables, ALL of which are duplicates with other locos 0
Total 73
This totals 73 unique timetables amongst the 4 loco types. Yet my game says I have played 74 of 75 total
unique timetable missions.

Has anybody had a similar problem and/or knows the identity of the missing timetable services?

 

I think theres one that’s only available in one of the liveries of one of the trains... um... will go look and come back and edit when I’ve found it.

 

See this one:

 

Thanks I'll Check it out

 

I changed the livery of the SD 40-2 to YN-2 and an additional timetable service appeared

K143 - Oil - South Philadelphia to Rose Lake (Cumberland to Rockwood)

Thanks for the tip - much appreciated