I’m not sure what you mean by the “stitching pattern.” Do you mean where your personalized initials are, or the colored area outlining the entire pad? It’s very similar to the pads I use, and what shows up is sweat marks where the saddle comes in contact with my mare’s back THROUGH the pad. If you mean the initials themselves are causing the marks, can you feel something rough if you slip your hand under pad? What kind of marks does it leave on your horse? The more I know, the better I can help you.