[gaming_mouse]

I thought that the answer would be that I needed 2 bets to see the turn card but, if I missed, I would have to revert to 4 bets to see the river card.

You are correct and are doing nothing wrong. The quote in your post is making an astonishingly basic mistake. You should not ever listen to anything that person posts ever again.

Because of implied odds, it almost always makes sense to call a 4 flush down to the river except when you are heads up or when the board pairs and you have good reason to believe a full house is out. So just a general rule of thumb, prepare to call your 4-flushes down.

Also, as an aside (and I don't mean to be rude), you should not pepper your posts with unnecessary history and explanation. Just state the facts and ask your question. It's too hard (and boring) to read long posts.

HTH,
gm