If you go back to your #36 and #39, you can see that you have identified some events on A and B which are identified as being simultaneous for O.
What you have not done is indicate what the clocks at A and B read at those events. However, if you look at the length of the line from the bend, when the clocks all read 0, to the events in question you will see that they are different lengths.
Therefore A and B will not read the same at those events. They will therefore be desynchronized according to O.