Some cases of buy and sell orders in Coinbase Advanced Trades are not being mapped 1:1 when there are multiple fills at a given fill price. When this happens, we're not able to form a trade. As a result, some transactions don't sync through to CoinTracker.
This results in incorrect asset balances/cost basis/proceeds/gains/etc. in CoinTracker.
As a temporary workaround, you can add the missing transactions manually to make your data more accurate. Please be aware that when we roll out a fix and start adding all fills through the sync, the manual transactions will need to be removed.