I noticed that most places on the wiki state that the one shot occurs after the series (except in the 1940's page, which actually places the events of the one shot before). I find this odd because along with the one shot saying that it takes place one year after the first avenger, it also contradicts a lot of development that came from the series if placed after. She becomes a well respected SSR agent, and is able to move on from her relationship with Steve Rogers, at least to the point where she no longer has flashbacks of the moment he went into the ice. Along with all of this the first episode of Agent Carter shows a flashback from the one shot. I know that no matter where the one shot is placed there are going to be some inconsistencies, but I think overall the one shot makes more sense coming before the series.