VeChain (VET) does not sync all transactions. This has happened in the past and we will need to review what has changed since then and action to make sure all transactions sync into CoinTracker.
Currently, users will need to manually add or edit any incorrect or missing transactions. Alternatively, if you are a user that is missing a lot of transactions we recommend that you transition your VET wallet to a CSV import instead of the our API integration. Users can format their VET transaction history CSV per this guide and import the CSV into CoinTracker as next step while we improve this integration.
Thank you all for your patience! We look forward to improving our product and your experience with CoinTracker.