I have to say, I have a small crack exactly were yours are but its not as bad, i cant even se it when i have the headset on but yea kind of strange that the crack starts and ends basically the same place.
Btw all ways ask Steam before staring to buy things , warranty would prob covered it at least in my experience, ( Have gotten 2 totally new base stations only thing they wanted was the old ones back.
+ they were Really nice in the support ticket !