I have a few recent running activities that are displayed as running in the reports (Total Distance and Total Activities Time). I have taken the reports off the dashboard and then adding again, but doesn't help. Everywhere else they show correctly. In the Activities table and in the calendar they show correctly. In the Calendar weekly total they show correctly. Also if I double click to show in full view, they show correctly. In classic reports they show correctly. These activities were originally recorded by my Garmin 405 as cycling but edited them. I have other activities that I had to edit and they are fine.
Rather than go into a long explanation, I'll just say that this is a bug since last November and there are multiple threads about this. Search the forum for "reports incorrect" and you'll see various options about what you can do.