My sister was definitely born female, why is ancestry dna saying she's my brother?

Ancestry DNA is saying my full sister is my brother. Google says this could be misinterpreted information from ancestry, or a rare case of half sibling/first cousin. I really hope this is a misinterpretation of information. Ancestry DNA has already thrown a curve ball my way by exposing a match with my childhood best friend who turned out to be my half sibling!

Ancestry DNA is saying my full sister is my brother. Google says this could be misinterpreted information from ancestry, or a rare case of half sibling/first cousin. I really hope this is a misinterpretation of information. Ancestry DNA has already thrown a curve ball my way by exposing a match with my childhood best friend who turned out to be my half sibling!