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Hello @glee5975, I am surprised by what happened to you. Usually the timed boosters are awarded for exactly the amount of time indicated. When the boosters are the same, the times awarded should be added together to indicate the total time a booster is active.
For example, the Friendly Charge made from collected fragments lasts for 2 hours, but if it is purchased from the Store it can last between 1/2 and 2 hours. Were both of your boosters awarded from collected fragments?
If you share your User ID here, we may be able to get your missing boosters restored. Did you happen to take a screenshot of those rewards?