Based on my (admittedly limited) understanding, many of the left-skew & right-skew references on this page are backwards.
Here is what Wikipedia says about left & right skew:
Negative (left) skew:
"The left tail is longer; the mass of the distribution is concentrated on the right of the figure. The distribution is said to be left-skewed, left-tailed, or skewed to the left, despite the fact that the curve itself appears to be skewed or leaning to the right; left instead refers to the left tail being drawn out…"
Positive (right) skew:
"The right tail is longer; the mass of the distribution is concentrated on the left of the figure. The distribution is said to be right-skewed, right-tailed, or skewed to the right, despite the fact that the curve itself appears to be skewed or leaning to the left; right instead refers to the right tail being drawn out…"