Mel Kiper seemed to be getting more and more miffed Thursday night as the draft didn’t seem to be going as he predicted it and teams actually ignored the players he gave them and took someone else.

In fact, the first round wasn’t a good one for draftniks.

For example, I kept seeing mock drafts with Prince Amakamura going ninth to the Cowboys or 13th to the Lions, who ended up with Nick Fairley, who at one time was considered a possibility at No. 1. The cornerback known as Prince ended up at 19 to the Giants, who were so happy to see him that they took a player at a position where they don’t need that much help. “You can never have enough cornerbacks,’’ coach Tom Coughlin said, repeating the mantra Giants execs have used in the past about pass rushers.

Then there was Anthony Castonzo, the offensive tackle from Boston College. An offensive lineman from B.C. comes with a guaranteed pedigree stamp, so he was originally marked for the Giants in early mocks (they do need OL help), then promoted to 13 or 15. But he slid back, right by New York, which, I heard, wasn’t that enamored of him and landed with the Colts. That was a perfect pick for a team that needs more holes for its running backs and more protection for Peyton — one reason Indy was picking as high as 22 — unheard of this decade — was the offensive line.

None of this is surprising.

In fact, “surprising’’ is always a key word because teams spend the pre-draft period spreading disinformation (OK, lies) about their intentions. Mel? He caters to his own ego, placing players as he sees them and how he thinks teams should see them, then gets upset when they don’t do what he thinks they should do.

But hey, we all do that to some extent.

I feel most badly for the Seahawks. If they’d lost their final regular-season game to St. Louis last year, they’d have picked seventh. But they won it, took the NFC West at 7-9, then had the audacity to beat the Saints at home in a game that ... please ... should have been played in New Orleans.

Because of it they picked 25th and took James Carpenter, an offensive lineman from Alabama, who most folks had projected as a late second-rounder or worse. Of course late second-rounders also turn out to be better than they’re supposed to be so maybe Pete Carroll knows something.

But he still paid too much.

On that, I agree with Mel.