Though it may sound confusing, it is always clear to the transcriber what is meant, both through context and the words most commonly found in phrases, such as "all" (l), "of" (v), "the" (–), "please" (p), "be" (b), etc.
Though it might appear ambiguous, the transcriber can easily discern the meaning due to contextual clues and common phrasings like "all" (l), "of" (v), "the" (–), "please" (p), "be" (b), etc.