This conversation has been merged. Please reference the main conversation: Lightroom: Crop to specific pixel dimensions
When resizing in Lightroom, setting a custom crop too close to a default ratio, the crop snaps to the default. This seems to affect export, as exported images are 1 pixel off of the size set with dimensions.
If I choose 2697x1518, that's what I need.
The publishing page simply will not upload a file that is 2697x1517.