All sorts of oddness. Like stopping in the middle of each track and looking along the line when using the level crossing. Seemed to touch/examine one of the grey boxes that the barrier arm is driven from. Most hilariously he looked at the wig wags as though to check they were working, only it would have been impossible to determine that as they weren't activated at the time. Had a sheaf of A4 paper in his hand, but no clipboard or pen.It sounds suspisious to me from what you have said.
A NR employee would there there with a purpose and would know what he is doing.
By what you have said the only two things he didnt do that were odd was look before crossing the line and telling the passenger he doesnt know the train times.
I was on the phone at the time but could see other passengers bemusement at his behaviour, especially when he started telling at people well out of earshot.
I don't think they meant any harm, but one day a fantasy might be taken too far.