The devs do normally ask what device/platform you play on. Are there other guilds below the Russian Workers?
If not, then it could be that the brackets were merged to give all initially ranked 2521 guilds the opportunity to compete.
If there are other guilds in b254, then perhaps another current 2529 disbanded, and RHW moved up to fill their spot.
Good luck either way. Hopefully you get credit for the win, unlike Switch players a few GW back.