It's your misunderstanding of what it means and your singular focus on that which is the problem. Your failure to look at other data and information objectively and to integrate that into an overall picture of the science, and not helped by your failure to actually listen to what is being said to you is the other part of the problem.
You have a simplistic straw man that the stratosphere should be cooling.
Try the stratosphere should be cooling, due to greenhouse gasses, instead.
Add to that, what is the effect of ozone depletion and recovery on the stratosphere?
And are there any other variables involved?
Add to that, in which parts of the stratosphere do greenhouse gasses and ozone predominantly act?
It also might help to recognise that, during other parts of the history of records on this, the stratospheric temperature, by one measure of that, has been reasonably flat, as they are now, but overall has shown a downward trend. While other parts of the stratosphere have shown a consistent cooling without the same flat spots. What's the explanation for that? How does that relate to the situation now?
All of that has been covered in the thread. Maybe you could read it again and see if you can come up with something other than repetition of the same talking point you are fixed on.
