Ikea Besta doors not flush - defective?

Hello everyone,

after assembling a Besta cabinet, I’m not sure if the door is incorrectly installed due to my incompetence or if the door panel is defective.

Here is a picture of the current result:



Two drawers are installed at the top and two doors at the bottom. The problem is now the bottom right door, as you can see better here:



The door only does not sit flush at the top left corner. That means the corner protrudes further into the interior of the cabinet than the bottom door. To me, it looks like the door itself is crooked/warped.

Does anyone have a tip on how I can adjust the door so that it looks good, or do you think a replacement is necessary?

Thanks in advance for your feedback!

Best regards
Stevo

Hello,
in the picture it is not visible that the right door is recessed further at the top left corner. Logically, this means a deeper recess; the door rests on the cabinet at the upper left corner and not at the bottom. Accordingly, everything else would be wrong.
So the first check would be, are all the buffer stops in place and where do the doors rest on the cabinet and where not?