I don’t have the part, nor could find a datasheet, so I asked people to check it before use because I couldn’t verify it.
Mine was 0.100" too wide so I removed it - it doesn’t have the gerb error -, so I left it to someone with an actual board. He added bits I don’t know about, like a 6pin and 8 pin and 6 holes. I can guess the 6 and 8, but I don’t know where the 6 holes go as they don’t look to be on a 0.100" grid. I don’t think I can do anything without the part.
Really those other pin headers shouldn’t be on the PCB because people use it as a template for a shield, and all those extra holes will be drilled in the shield.