Numeric columns are being sorted incorrectly

[mblagden-mdsol]

This screenshot is taken from your documentation. When the Total Revenue column is sorted, its sorting the values 748, 400, 3264... where I'd expect it to sort them 3264... 748, 400. We're seeing similar issues on our numeric columns locally, sorting columns like 9, 8, 45, 3, 28, 10. Is there any way where we can indicate a column is numeric?