
Yes, there needs to be a reload option for files in the Media Pool. In the mean time, you can get around this by using a Loader to go directly into the flow on the Fusion Page. The only downside is that the Media is not added to the Media Pool so you have to track you project collection the old fashion way with folders.
I'd also suggest going to Reactor and adding the "Reload Loaders" script that will add a "Reload" button to the Loader tool to make what you're running into easier to deal with.