The first sentence could be by itself and still not a run on but the other is dependent on the subject of the first sentence. I think it's one independent and one dependent.
In grammar, sentences can be simple, compound, complex or compound-complex. In the case of compound sentences, these are sentences that contain two or more independent clauses (clauses that express a complete idea) usually link by a semicolon (;) or one of the coordinating conjunctions (for, but, and, so, or, nor, yet). This occurs in the sentence presented because this contains two independent clauses "The team won the majority of the regular season games" and "they were optimistic about a victorious post-season" joined by the coordinating conjunction "so". Thus, this sentence is compound because it contains two independent clauses.
You do not have to wash a cutting board between cutting different foods
Explanation:
One of the misconceptions about food safety that I saw in the video was that a person does not have to wash a cutting board between cutting different foods
The prince laid himself down on a couch with no pillows, he was upset and thought of what he has to do. He tries to get some food to eat but there were only rotten apples. There was a songbird with him and he takes out his anger on the little bird.