Q: 2560 x 1080 at Two Screen using 2016 MBP retina

Hi,

I have a MacBook Pro (retina, 13",Early 2015), processor 2,7 GHz Intel Core I5, 8GB, Intel Iris graphics 6100 1536 Mb,

I've been trying to use it with my 2 monitors Lg 29UM68, they are 29" ultra wide monitors with the resolution of 2560 X 1080 (recommended), I got image using both thunderbolt ports (with cables mini display port X Display port 1.2), I can also get images in both monitors using Thunderbolt with the HDMI port.

But the image presented  in one of the monitors is slightly smaller then the other in both situations (one side I have full image at the monitor and in the other I have a good image but 1/2" smaller at top and Botton and 1"smaller at the sides), even with the monitor window showing the same resolution of 2560 X 1080, I have exchanged the monitors and Cables and I always get the same result both monitors showing the same resolution but different images sizes, using the monitors extended or mirror.

Does anyone know how to fix that, or it is really a limitation of my Macbook.

regards,