He was indeed man marked in some games, which caused our creativity to be greatly reduced since it runs through him most of the time.
I do remember Ole switching to the double pivot as soon as the Liverpool game, where Pogba played beside Scott and helped us see out a draw; so he didn't spend very long in his favoured position. Ole would alternate between the 2, finally settling on his preferred 4-2-3-1.
The confusing thing to me was that Ole addressed the problem of not having any creativity besides Pogba by buying Bruno, but then is still sticking to the 4-2-3-1 which in my opinion is not as good a fit for either player.