The mark at Mirror 2 is very distorted, rather than round.
The tape is at a 45° angle to the entering beam, so the spot will be wider by a factor of 1.4, but something is badly wrong with the overall shape:
The beam is more than 3× wider at the far point and the distortion has turned into a tail:
The spot at Mirror 1 looks reasonably good, so perhaps Mirror 1 is damaged. If the mirror is good, then the beam shape at Mirror 2 confirms @jkwilborn’s suspicion the tube is not operating in TEM00 mode.
As I explained, a bar is the shape of a defocused diode laser beam. The red-dot module is focused to produce a small dot at the platform (about 1.5 m away through the main beam focus lens), but will be defocused at shorter distances (just outside the module at the main tube).
I initially thought the red-dot module in your machine is incorrectly focused at the platform, but damage to Mirror 1 could account for its shape.
Take a close look at Mirror 1 and upload a picture with the mirror reflecting a plain background so we can all see what you see.