Weird text alignment interplay between settings

If this template helps then use it. If not then just delete and start from scratch.

OS Win10
PsychoPy version 2020.1.3
**Standard Standalone? yup
What are you trying to achieve?:

Moving my text stim (sentences folks will read) to the top left of the screen, left-aligned, with wrapping set to about 2/3 of the screen.

What did you try to make it work?:

I set the position to (-400,350) [using pixels], size to 55, and included code to left-align my text:
sen.alignText= 'left'

All is solved, save for the word wrap. So, I choose 1000 as a good-enough length (my screen size is 1920) and my position gets changed…

I increase my word wrap to 1500, just to see, and my X coordinate goes off-screen.

Why are these textStim settings not working together?