The camera is positioned off-center; the guidelines are moved to the right to compensate for the difference.

 

it was stated earlier that the camera wasnt misaligned and that the older hitch setup was straight.
this means that it could be the new receiver to camera alignment or the new ball mount to camera alignment.
i think that the original ball mount was then tried and was now not aligned, thats my take based on the wording.
this means that its either a size gap issue at the tube interface (less likely but can be checked with the anti rattle hw) or an issue with the new receiver being misaligned.
plenty of toyota oem receivers are either angled/rotated or canted so this is a high probability. this is why i said to go check/measure.

 

You are misunderstanding the OP's complaint. He had a Curtis bumper hitch on the GX and the red cameral guide line was on the ball. He then changed to a OEM Lexus frame hitch (to get more capacity) and now the red guide line is not on the ball, it is further aft. Based on the dimensions in the OM, the guideline is not supposed to be on the ball (unless you install a non-oem ball mount, so it sticks out further). So that fact that the red guide line was on the ball with the Curtis hitch is because the it is a bumper hitch and protrudes out further. Not sure what ball mount he is using but that could be part of the difference. Lexus never intended the red guideline to be on the ball, there is no mention of this in the OM.

I have a GX with a OEM frame hitch (installed at the port) and OEM ball mount and the red guide line is not on the ball, either. For that matter, the two pics above are nearly identical, two different GX's.

 

i agree that the red line isnt meant to match anything besides a distance and commented that above.
but then, looking at his images, you can see the centerline is off.
if this wasnt off before then this is an issue. your pic is straight, his is not.
if this was off before then it could be able to be adjusted with a camera adjustment.
if it wasnt off before then he could have one of the many misaligned toyota receivers
the OP mentions suspecting the tongue to be bent, would have to be some bend to impact the red distance line that much.
we dont see any images of the OPs setup ever being good, so im wondering still why he says the camera was still aligned and now the ball isnt. if its really that he only looks at the red distance line then thats not the issue at all.
if the centerline has always been off then i dont think theres a bad receiver either, in this case i think the camera shouldnt be considered aligned if by aligned its meant to look like the image you posted.

 

the more i read the original post the more confused i get. the image titles indicate that there are images of 3 receivers, all out of alignment. the text states that the camera is aligned.
i dont think that all 3 images are of different receivers or that the camera is aligned.
when i look at the images, the only issue i see is the blue centerline. i get that the images show a difference of the red distance, but i didnt believe that the post would be about that and not the blue.

 

Wrong, the blue lines are centering lines...read your manual.

He's referring to measuring the hitch, not the camera. Sorry if I come off rude, but are you thick??? Seriously, go back and reread the Op's post. He's talking about the TRAILER BALL not aligning up with the BLUE line. I tow a boat 1500 miles every other month, I know what he's talking about. It's either the trailer ball is bent due to welds or the entire hitch itself is not correct. Either way, a simple tape measurement can tell if it's off or not.