If a player uses the Office to load the same kind of good into the Trading House, and also has a Market (either type), does she still get the doubloon bonus for the Market?
Your wording "the same kind of good" seems a little odd. What the Office does is it lets you load into the Trading House a kind of good that is already there (from a previous round or from someone else earlier in the same Trader phase). I hope you didn't think the Office let you load two barrels of goods into the Trading House in the same Trader phase.
Anyway, if you have a Market (either type) and a colonist on it then you do indeed get the doubloon bonus (or both bonuses if you have both types of Market) if you load any kind of good at all into the Trading House, whether or not you needed to use the Office.