Hi Gary
The form of the imperative for tú coincides (except for the irregular imperatives) with the 3rd person singular (él, ella) of the present indicative. I imagine you refer to the sentences in the examples that look like a present indicative, e.g "Prepara la carne para él" (Prepare the meat for him [command]). This could also mean "He/she prepares the meat for him" [Affirmative sentence in the present tense indicative]. They coincide in the form.
I hope this clarifies your doubt. If you refer to something different please let us know.
Gracias
Inma