I only looked at the box score, but it seems like the GDP helped your team a lot in the first half, while your opponent's team was clearly stronger. It's believed that GDP effect is stronger earlier on in the game as teams adapt to their opponent's tactics. There were also three injuries in the game which mixed things up. I've kept games against stronger teams close in the first quarter/half before only to get blown out later, and it's not an especially uncommon occurrence in general.
The situation is normal.