Miraculous Ladybug/Headscratchers

The Bubbler

 * Nino sees a small kid being taken being for chores when he goes to the park. I don't know if I'm spoiled or just got lucky with my own mother, but that kid looks way too young to be doing chores.

Mr. Pigeon

 * Ladybug's Lucky Charm is a coin. She ends up saving the day by buying a bag of popcorn from a vending machine. At the end of the battle, she throws up the coin for she can turn everything back to normal. My problem is how she got the coin back? We never see her retrieving it but she still has it just in time to world heal. Did it fall out the part of the vending machine that spits out spare change? If so, how? Since it's a magic coin, does it just have infinite amount of money and would've fallen in there to begin with?
 * Another is: what part did Alya have in the project? The assignment seems to be a partner one, yet we only see Marinette working on the derby hat and the show only credits it as her hat. Why present the assignment as a partnership at all if only one person is going to be credited as the winner?
 * Also Nino is with Adrien when they present the hats. Why? Was the class already paired up and when they presented the assignment to class including the part Adrien would be modeling the winning and since Nino was already paired with Adrien, he got exempted from the assignment as well?

Timebreaker

 * Why Marinette getting scolded for not being there at the bakery, when it's Nadja's fault for being early? Also were her parents' really expecting her to wait in the bakery until she was supposed to come down and give Nadja the cake?
 * The episode ends with Alix saying she should've taken responsibility of her possessions. While I don't disagree with that moral, I also agree with with Alix that's everyone involved is blame.
 * For Alix, why didn't she think to leave in a bag or leave it with her father until she was finished with the race?
 * For everyone else except for Chloe (since it is in-character for her at least), why did no one think to put in their pocket (or Marinette's case, her bag)? Yes, things can still fall out of pockets but better that than risking the object falling out of your hands.
 * For Alya specifically, why did she think to give the watch to Marinette? Yes, she is her best friend and can be reliable, but she also has a reputation of being clumsy and also had to hold something up? The latter is the reason she almost drops the watch in the first place.
 * Are Nino, Juleka and Nathaniel okay? We never see shots of them frozen and fading.
 * Not that I want her to win, what was stopping Timebreaker from touching Ladybug's face after accidently stealing Chat's? Was she that surprised she managed to get so much time from him, that she didn't think to take care of Ladybug as well and take both of their miraculouses before Ladybug could fight back?
 * How did Ladybug know Timebreaker was going to try and steal Chat's miraculous before he faded? Can she hear Hawkmoth? Did she see Timebreaker look back at them and infer it?
 * The second time the watch falls, it's broken just from Chloe dropping it? Why? The first time, it took a few tumbles before being broken by Alix skating over it?
 * This'll probably be a problem for all the other time-travel episodes in general, but how does the time-fixing work? Did the Miraculous Ladybug wave correct the bad timeline by fusing it into the good timeline there in, so the one they started in, doesn't exist anymore? Or is there a timeline with Ladybug nor Chat Noir no longer exist in, all those characters faded from existence and Ivan is the sole survivor (assuming you think Nino, Juleka and Nathaniel were frozen off-screen) of the akuma attack?