Almost all of the Union Pacific Heavy Diesel locos(AC4400CW from Cane Creek in this case) have their loco number above the windscreen of the cab. While the one from this simulator have them placed on the nose by the headlamps... Its quite a striking visual inaccuracy and should be looked into. I hope it wont be that complicated to shift the numbers to the top of the loco. I hope devs look into this matter and fix this really soon
It is not a bug, Skyhook just choose to model this variation of AC44's from Union Pacific. All of Union Pacific earlier orders were in this configuration, which starts with UP 6550, and runs to about 7137, with space made for the AC4460CW convertibles. UP 6703 to UP 6737 are the Ex-CNW Units, which are also configured the same way. Only UP orders with them above the cab are the Ex-SP units (#6145-6426?) the later orders (#6428-6549, 7138-7297) and the AC44CWCTE's (#5554-#6081)