If a wallet has an extreme number of different spam tokens (approximately 1200+) on its transactions, not all transactions will be imported to CoinTracker.
When this issue occurs, users have found that the wallet will add, but the only transactions that sync are dated from the day the wallet is added onward. If there are no transactions for the day that the wallet is added, you may see the wallet added successfully, but no transactions will appear until new ones are created. Historical data is never added.
This happens because when there is a huge number of different junk tokens, the process of checking each token to map pricing data cannot complete. Using a CSV import or manual entry to add the wallet is likely not practical in this situation, so there is no workaround for this issue.
Once the process of adding wallets is optimized for this scenario, all transactions will be synced when the wallet is added and users can set the "ignore" category as needed on transactions with spam tokens.