How Porfiry described in a contradictory way?

Porifry's description contradicts itself in a few different ways. First, he is described as fat, short, and stout..... then he is described as having a womanish figure. Secondly, he is described as sickly looking, which is immediately followed by his "vigorous" expression.

Porfiry Petrovitch was wearing a dressing-gown, very clean linen, and trodden-down slippers. He was a man of about five and thirty, short, stout even to corpulence, and clean shaven. He wore his hair cut short and had a large round head, particularly prominent at the back. His soft, round, rather snub-nosed face was of a sickly yellowish colour, but had a vigorous and rather ironical expression. It would have been good-natured except for a look in the eyes, which shone with a watery, mawkish light under almost white, blinking eyelashes. The expression of those eyes was strangely out of keeping with his somewhat womanish figure, and gave it something far more serious than could be guessed at first sight.