Is the second "on" necessary in this sentence?

“It still makes economic sense” to put on as much weight on as efficiently as you can, to minimize losses” feedlot owner Tom Fanning told Bloomberg.

https://www.voanews.com/a/mht-good-news-for-burger-lovers-beef-prices-fall/3092061.html

here:

to put on as much weight on as efficiently as you can

the second "on" here makes me confused!

There should only be one adverb, although it can be in either location:

• to put on as much weight as efficiently as you can
• to put as much weight on as efficiently as you can

As an aside to the original question, for me there is a difference between "to put on weight" and "to put weight on".

The first case implies that the subject and object are the same person. "I've been putting on weight" = "I am the one who is heavier now."

The second case sounds much less common to me. It implies the work of a farmer or animal breeder or anxious parent: Person A provides fattening food for Person-or-Animal B.

I'm guessing that the original "on" was the first one, and that, on re-reading, the writer thought: "Ah, it sounds as if the farmer is gaining weight. I should move that 'on' on a bit further, to avoid ambiguity."