First of all the 4th wave is extraordinary long but yet fits into the starting channell
Then other thing that could seem rare but is not at all is the fact that the b wave extend beyond the start of wave a, we should remember that the structure of triangle determine the nature of itself as contracted or expanded due the relation, in this case as the triangle retraces down the 3 wave and c is higher than a the triange is contracted.
Then the rest fits it self.
The guides that confirms our posture:
The 4 wave retraced the 38.2% of 3