It's hard to say what is going wrong here with the dialog area without knowing what exactly you are doing.
The dialog area is not broken, it's just the options for the alignment of the text, that is not working properly. If you keep the alignment to left (game properties / behaviour) all is working fine.
So it's the text for the dialog options that is stuck on the left side for you? Not the actual text spoken by the characters?
The dialog area needs to be defined in the tab of your main character.
1. add an image for your dialog area
2. place the image with the moving tool, you can additionally highlight your game resolution
(If you don't have a background image for your dialog area, skip steps 1 + 2 )
3. draw the text box for your dialog area
This box needs to be where the area should be - if you aren't using a background image, highlight the game resolution to be sure you are drawing in the correct spot.
Well, I've tried exactly what you're describing countless times. I've also watched various tutorials on this and, to be honest, there's not much you can do wrong.
Here is an example image. On picture 2 we can see that I have positioned the text selection on the left edge, not exactly on the left edge, but with some distance. As a result, however, we can see in image 1 that this positioning is only taken into account in the height, i.e. on the Y-axis, whereas the X-axis is ignored in the width! It is therefore not possible for me to position the dialogues, because there is of course no question of them sticking to the left edge.
Of course I would also like to position the answers themselves, as there are no moving characters in my Point of View and I define people as objects. However, I have not yet found a way to position answers, which is why I replace them with display texts, which is of course very inconvenient as I can hardly use the dialogue system this way.
BUT it would be enough for me if I could position the dialogue selection and move it on the x-axis, but unfortunately I can't do that.