We have a bug with a line break (e.g. when you press Enter on the keyboard) not being captured - we are actually looking at improving the whole text interface side of things significantly in the coming months, and this will come of the wash then. For now you may be better off having separate text boxes per line - which I know is not ideal but at least in this instance that’s only 2 (so 1 extra).
For the movement of the text, I can see that both the position and size change between the steps. If you click on the text item, on the property bar at the bottom, you can click the position tab or size tab and see its value.
When you change between steps you can then check them again and see they are different. You will want to make sure they are the same between steps.
One other consideration you may want to make is that you can set the animation options for an object. By default if something is changing position, it will animate, you can stop this, so even if it was changing you may not notice it. Choose the object. Go to General - Animations and set its “On Move” animation to NONE.
I hope this helps, if not, just say and a member of the support team will be happy to investigate further.
FYI I hid your last message just because of the link.