It is good. I would place a comma between clauses in 8, but I imagine that some would not.
Student or Learner
Oh, I'm sorry for disagreeing! I did it by mistake.
Please, correct all my mistakes. I should know English perfectly and if you show me my mistakes I will achieve my dream a little bit faster. A lot of thanks.
Not a teacher nor a native speaker.
I am not a teacher.
Wasn't it reversible before the whole thing stopped working properly?
Is there any danger of that being fixed, BTW?
Yes, they were all reversible at first if you clicked on them in error or changed your mind.
The administrators are aware of the problem and are working on it.