Correct....unfortunately it is like that all the way across all four doors....each one is at a different height. Stand and tank are perfectly level. The couple of Cade tanks I have seen in person are all just like this.....maybe you got lucky....or we got unlucky lol. The bottom gap on the left door is larger but fortunately you can't see the bottoms due to them being down so low. I haven't gotten as far as measuring the connection points yet only because it won't be worth it to attempt to remove and reattach. I will do that tonight just out of curiosity. I also have a 1800.That's odd. The left door looks like it's to high all the way. I was going to say your tank is not level but now I am not so sure anymore. What is the bottom gap like on the left door? How far is that hinging pin in the hole? Have you measured the frame size of the stand and doors? I got a 1800 and my doors align perfect.