Captured island not captured - trophies missing

My Ingame username is Holofernes. I just attacked one of the islands that recently opened up with 30,000 Prestige, in the south-east corner of the map. The southernmost (311 Wisdom) island was shown as worth 28 or 29 trophies, owned by Sam Deadshot. I attacked and just won it with less than a second to go. I received only 14 trophies and the island is still shown as owned by Sam not me. I used a couple of invocations so I really want those missing trophies please! 

Hi,

Did you win this battle with 3 laurels or less?

If you didn’t finish the battle at 100% you will earn only part of the trophies and the island will still be under the control of the other player until you beat him at 100%.