The flash variable is supposed to be used before a redirect. So it appears in the resulting page and waits for a request. So if we use it before we do anything but redirect, for instance before render, it would appear in the rendered page but is still waiting for a "redirect" request and so will appear again if you click a link.
To avoid this weird behavior we use flash.now during a render instead of flash. flash.now is supposed to be used in pages that are rendered.
To avoid this weird behavior we use flash.now during a render instead of flash. flash.now is supposed to be used in pages that are rendered.
