Check your export settings. Look for a place where it gives you options for size based on pixel count. Do not crop the shot and do not compress it. Just size it to fit within a 1000 pixel size.Okay not sure on how to do that I will go back into Lr and try again. Thanks
No need to try to adjust the height in this case. The height will be automatically adjusted based on the original proportions. If you make the width 1000 pixels, the height will adjust to whatever it is supposed to be.