Moyes admits he's unhappy as Everton suddenly are struggling to defend set-pieces.
He said: “I think we probably had the third best defensive record for set-pieces before we went into today's game.
"But no, the two goals were too similar for my liking.”
Moyes continued: “I think what it tells you is that if you want to try and be successful in the Premier League you need physical stature in places and sometimes you're having to play players because of that and you're requiring that to be able to accommodate not conceding goals, maybe helping you score goals.
“Let's be fair, today Tomas Soucek might not be the first pick as a technical football player, but because he can score and because he can head it out of the other box it becomes really important in the team's setup.
"That's why I try to get the balance right between that type of player and smaller, maybe more technical players. We are just in a bit of a difficult time in the last two games with it.”