Comma between two verbs having the same subject

I am referring to the rule "Do not put a comma between two verbs that have a common subject."

So the following sentences in some fictional works are fine to me:
"The other man spoke to him sharply and pointed to the camel drivers..."
"She lay down again and faced the sky above her, seeing the high palms..."

But the other sentences, written by acclaimed writers (even for those same books), seem going another way:

A. Two verbs in a compound predicate (with a coordinating conjunction like "and" between them)

1. Kit stood unmoving, and slowly looked about the bare little room with the door on one side, and a window on the other.
3. She wept, and let a few tears fall on him.
4. She had become quite docile, and ate whatever was fed her, but the men took no chances.
5. Port was silent awhile, and said in a whisper: “That, for instance.”

B. No coordinating conjunction between two verbs
1. They came to a village, went through it.
2. Through the open door, she'd seen the lights shining, hearded the droning of prayers.
3. She looked into the sky, saw space growing ever clearer.
6. She fumbled in her handbag for the slip of paper Mr. Clarke had given her, found it.
7. We walked back, found a ladder in the garage.
8. We got out of the pool, showered.

I think the sentence had better break into two independent clauses connected by a coordinating conjunction, so the comma can be placed before the conjunction, e.g., A4 "She had become quite docile, and she ate whatever was fed her, but the men took no chances."
But this way seems not good for dramatic effect in fiction with other sentences.

Please help let me know:
- Is it okay to break that rule in writing fiction?
- Can we accept those sentences using other rules ("Use commas to set off words that add emphasis, shift attention, provide a fuller explanation, separate contrasted elements or to indicate a distinct pause")?
- Your further advice for this case.

Many thanks.