30% Block Finder: 30% of the block reward is paid to the miner/wallet that found the block.
70% Historical Shares: 70% is split amongst all miners (payout ranges based on how many shares you've submitted on average over the past six hours).
It is likely you chose a worker name that is a duplicate. But don't worry, it is a visual bug and all shares submitted are credited to your address. Consider changing the worker's name to something a little more unique, it should show up under your wallet at that point.