1918-S "Walking Liberty" Half Dollar With Damage Or Planchet Error ?

I recently get a 1918-S "Walking Liberty" half dollar, and two aspects of it have made me confused. First, there is an indentation present on the rim of both the obverse and reverse sides; notably, these indentations are located in corresponding positions (outlined in red in the accompanying images). The distinction lies in the fact that the indentation on the obverse does not quite reach the coin's outermost edge, whereas the indentation on the reverse extends all the way to the very edge—though the reeding in this specific area appears largely unaffected. My second point of confusion concerns the obverse side, where some extraneous material is visible at the 2 o'clock position relative to the sun motif. I would appreciate it if the community could shed some light on the cause of these two anomalies: specifically, what created them, and will they negatively impact the coin's grading? If not #65292;grade it. Thank you.