Hello again Braidedtails
The thing with the feet that you describe is called 'tracking up'. Some horses track up naturally, even when they are walking around with their heads in the air and/or hollowing their backs. Many horses don't quite track up (ie their hind feet land just behind where their front foot was) in normal walk, but one of the results of asking for more impulsion, and holding that front end in, engaging the hind end, is that they will 'track up properly' ie. Do what you describe.
My point about your trainer was this:
I have had lessons all my riding life, because I love learning. I have had many different instructors, and many/all of them tried to teach me to bring a horse on the bit and achieve that correct engagement and outline.
Many many many of them failed in this task - some were poor communicators, some did not understand how to do it themselves and just went for the false headset thing.
If your trainer is not helping you, there is NOTHING wrong with using another. We don't have to have exclusive relationships with our instructors! You can learn a lot by reading in the dressage part of this forum, but almost nothing beats the eyes on the ground watching you.
By the way I love myself a stocky solid horse
Oh - and I'm not being narky about the station thing. I genuinely don't understand what you mean. In my world a station is where railway lines pass through or terminate at. I am now guessing that you are in NZ or Oz and I am still guessing that a station is a kind of ranch?