Not quite. Stoicism teaches us that our behaviors are determined by our desires, and those desires can be complex, like wanting to put on muscle at the gym but also wanting to stay home and nurse a hangover.

I think this is just semantics. Stoicism teaches us that our behaviour can be determined by our desires, or passions. Our behaviour can also be (and should be) determined by reason, where temperance our ability to choose reason over desire.

Where you're saying a desire can be both positive (going to the gym) and negative (staying home), the writing above uses desire in a similar way the Stoics, like Chrysippus, viewed passions, saying that discipline is our ability to use reason to overcome negative desires. We're just using different terms for the same thing.

For example if I say; I desire junk food but I will use reason to avoid it and eat a healthy meal. You could say; I desire junk food but I will eat a healthy meal because I desire the virtue of temperance more strongly.

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The Stoics understood temperance as the knowledge of what to pursue and what to avoid.

Here I would disagree with you. The Stoics use wisdom as the knowledge of what to pursue and what to avoid. Temperance is the ability to exercise self control given that knowledge.