New text message got added to someone else's text thread and now showing from the new text number???

I had a few texts to/from a friend. Then a new text from Home Depot's 5 digit short number came in, appended itself to my friend's text thread and put their number at the top as the from:

from Android Forums at AndroidCentral.com - Ask a Question https://ift.tt/2Q8ZrCK
via IFTTT