My league after a game has 15 Reputation point and it earns +1 XP. After next game I lose 1 point, so now I have 14 Reputation.
Do I lose the 1 XP I earned before?
And when will I return to 15 I'll earn another XP?
Good questions.....Short Answer =
No and no.Long Answer =
Note that these bonuses are called "Reputation Perks".
Remember, Perks and Abilities can never be duplicated on the same league/character. Also, remember that Perks can never be lost.
Once you gain a Reputation Perk, it's your forever. You can't lose it -- no matter how low your Reputation goes. Also, because you can never duplicate a Perk, you can't get the same level/bonus perk again - no matter how many times you cross the same threshold.
Using your example.... Nothing
happens when you drop back to 14 Reputation. And nothing
happens when you get back to 15 Reputation.
The only bad thing about losing Rep is that it will simply take longer to reach the next higher threshold.
I hope that helps.