Possible bug that's related to this thematically: APR values are incorrect by a factor of ownership percentage.

I jointly own a validator (50%/50%), and I operate this validator through an account owned entirely by me. To address the accounting discrepancy, I have customized the events for the validator deposit and all block rewards+withdrawals to use 50% amounts (since I only paid half the deposit, and I only earn half of the rewards). Problem is, when I look at the APR on the staking dashboard, it appears to be computing the percentage based on my share of the earnings (this is correct), but based on the full joint investment of 32 ETH (this is not correct), so as a result, the APR is half of what it should be. This then lowers my average APR for all my validators, making it harder to get a proper sense for financial performance.

Possible bug that's related to this thematically: APR values are incorrect by a factor of ownership percentage.

I jointly own a validator (50%/50%), and I operate this validator through an account owned entirely by me. To address the accounting discrepancy, I have customized the events for the validator deposit and all block rewards+withdrawals to use 50% amounts (since I only paid half the deposit, and I only earn half of the rewards). Problem is, when I look at the APR on the staking dashboard, it appears to be computing the percentage based on my share of the earnings (this is correct), but based on the full joint investment of 32 ETH (this is not correct), so as a result, the APR is half of what it should be. This then lowers my average APR for all my validators, making it harder to get a proper sense for financial performance.

this is for the performance in the eth staking view right? And yes there it's not take into account either and could also be done.

this is for the performance in the eth staking view right?

That's right - the "Staking per Validator" table has the wrong APR for the shared validator, and the "Staking / ETH" Overview panel also uses the incorrect APR value.

Another thought of how to do this accounting is to make the events have a debt component and an earning component... so when I get a block reward, my account gets all the funds, but it's also marked with a "Generate Debt" event... then when I disburse the funds that don't belong to me, I can just mark it as "Repay Debt"