contrary to an intuitive belief or to common-sense expectations
See counterintuitive in American Heritage Dictionary 4
(kounˌtər-ĭn-to͞oˈĭ-tĭv, -tyo͞oˈ-)
adjective
Contrary to what intuition or common sense would indicate: “Scientists made clear what may at first seem counterintuitive, that the capacity to be pleasant toward a fellow creature is … hard work”(Natalie Angier).