In the ingredients list for this loaf, it calls for 2 c flour, plus more for dusting. However, in the instructions, it never tells you what to "dust" with the extra flour. I thought it might be for preparing the pan prior to adding the batter, but the only loaf-pan prep called for is lining it with parchment. My question is two-fold: (1) what is the extra flour for and (2) should I be greasing and flouring the pan as part of the prep. Thanks!