23andme question / clarification?

Hello everyone! My cousin did his 23andme and I got his permission to post it. He’s half oromo (adama), half Amhara (Addis ababa), but I’m a little confused by his results. Why is the Tigray region the darkest shaded on the map, and why is it saying it’s one of his closest matches? No one in his family is tigrayan, so it’s a little odd it would show up on his dna especially when he’s mostly oromo? ! Also his country matches showed Oromo first but someone told me it’s a worse indicator than genetic groups. Thank you!