Is This Vista 20P Wired Wrong?

I came across this in the field and am mildly confused.

I thought EOL resistors were supposed to be ... well at the end of the line.

Looking from right to left, the last 5 are unused. Then you have 18,19,and 20, with 20 being the common. 18, and 19 seems to have a resistor across it. Wouldn't this mean someone could bypass a wire down the line?

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