It will be considered as bundled for every giveaway that was created after the date of the price drop
Check the 'Help' section
Why did my level decrease?
There are two reasons why a decrease could occur.

Values are calculated based on the current USD prices of games in the Steam store. If a game lowers in price, the value of previously created giveaways will adjust accordingly, and this will be reflected on profiles and levels.
Certain games on our site are flagged as "No Value" or "Reduced Value". This is done manually by our volunteers, and therefore there might be a delay before these values are assigned. For example, a game might be included in a bundle on January 10, 2018. If on January 13, 2018 we flag that game as "Reduced Value", with an effective date starting January 10, 2018 (the day the bundle started), then giveaways created between January 10-13, 2018 would have their value reduced accordingly.