Today if I need to authenticate to geocaching.com there will be a blue button in the top right corner. When clicking this button I expect to reach the geocaching.com authentication page, but instead there is an intermediate step which informs about the auth process. On this page there is another auth-button to click to get on with the authentication.
My proposal is to remove this intermediate step. You could add a question mark or "what's this" near the auth button on the top right, if it's needed at all. Or set a server side cookie so that the intemediate page is shown the first time.