P(x) for x=2 appears to be a glitch in an otherwise ascending series of values. If, for example the P values were in order: 1/10, 2/10, 3/10, 3/10, 1/10, they could be a skew distribution. The usual form for a probability distribution is a rise to a summit value and then a falling off; or a cumulative rise to a levelling off: 1/10, 1/10, 2/10, 3/10, 3/10. Although the values add up to 1, the implied shape of the supposed probability curve suggest that it isn't a probability curve at all.