At the 06:37 mark Angela (the greeting host in white) and William are going up the escalator and before they make it to the top they see a couple walk by.
When they make it to the top and walk off the escalator, the same couple walks by.
In Lawrence's town, the man in black loads seven bullets and a shotgun shell into his revolver. In the subsequent shooting scene, he shoots nine bullets and a shell.
When Logan shows up in his black western clothes, he stumbles and then "zips up" his fly. Authentic western trousers used buttons for the men's fly. Zippers were only added to men's pants after 1937, well after the time frame for Westworld (1870's).