I recently put mine back on after a repaint too. I just made sure the two ends touched up against the fender then screwed in the 7(?) screws across the top under the hood lip. I was lucky it fit nice. Seems as though your fascia doesn't have enough arc to it or the hood has too much since the ends are gapped nicely then touches in the center. Maybe take out the center screws under the hood lip and pull the center of the fascia out a tiny bit and tighten the screws back up? Give it more curve. I know its not real flexing in that regard but mayyyyybe?
Mine: IMG_0384.jpg IMG_0383.jpg
PS I found to get iPhone pics to show correct when uploaded, hold the phone landscape-wise with the volume buttons down and use the volume buttons to take the pic.