There is a flaw in your reasoning.
The +100% Bonuses only provide +1,000 XP each... regardless of your Game 1 or Game 2. You shouldn't count the "Base XP" earned just through playing because that's earned regardless of whether there's a Bonus used or not.
The "First Win" would not amplify other Bonuses. It would simply exist as an addition +500 XP in your example.