The picture you have displayed is correct.
If you opt Not to receive the 1,500 incentive than the rate for the terms listed would go down 1%.
I believe confusion is taking place when people are stating they got the 1,500 rebate and 2.9% but they are not specifying the term they went.
If at 72 months the Low APR advertised on Kia.com is 3.9%. If you get the 1,500 incentive then the rate goes to 4.9%. Some dealers may ask for 5.9%.
If possible my recommendation would be to get approved at your local Credit Union or bank then take the 1,500 incentive through Kia and refinance for the lower APR at your bank to get the best deal.