I went back through those threads and tried a few changes (language ID/Code, etc.) but they did not resolve the issue. I double-checked to make sure the "use products metadata" was enabled as well.

I did also verify because I thought I may have been mistaken when I first attempted a product update. I am able to update the following correctly (as well as the other standard fields):

v_metatags_products_name_status v_metatags_title_status v_metatags_model_status v_metatags_price_status v_metatags_title_tagline_status

however

v_metatags_title_1 v_metatags_keywords_1 v_metatags_description_1

will not update.

Maybe I am missing something in the past posts, so I am going back through them again. Thank you for taking the time and suggesting the post to start with.