The wonders of Word

My previous post about archaeology contained this sentence.

“Hey, what about these cows on the railway tracks.”

Word underlined it in green. I thought perhaps Word wanted me to put a question mark. Possibly an exlamation mark.
Apparently not. The two suggestions offered were.

“these cows on the railway track” and
“this cow on the railway tracks”.

It seems I can have multiple cows on a single track or a single cow on multiple tracks but not multiple cows on multiple tracks.
I am constantly amazed at the oddness of Word’s grammar checker.