redirects
red herring most certainly is a "herring that is red" - "A smoke-cured and salt-brined herring strong enough to turn the flesh red" = "a herring with red flesh" and shut up is to move ones lower jaw in an upward motion shutting there mouth, their for, shutting their mouth by moving their jaw in an upward motion. I'm not convinced WT:SOP applies at all. Since it is a redirect to an initialism, and initialisms aren't disallowed, then the full expansion of that initialism should be a redirect to the initialism itself. Even your WT:redirects#Redirecting between different forms of idioms says that this is allowed. "For longer phrases where there is little or no chance of the entry title being valid for another language, redirects are allowable. For example, burn his fingers or burning one's fingers should redirect to the pronoun-neutral and uninflected form burn one's fingers."
"If I Recall Correctly" is not an alternative form of an acronym/initialism/whatever, it is a regular English phrase, whose only meaning is completely transparent. We have no entry for "I am not a lawyer" either. While meanings of initialisms are not obviously derived from their letters. While red herring may refer to actual herrings with red flesh, it also has a figurative meaning, which is not obvious. "Does not equal" does not mean "there is no relation at all". And right now I am going to tell you to shut up, by which I mean I want you to stop typing into this page, which has nothing to do with anyone's mouth. I think.