It sounds like a tricky situation, but if you managed your winnings without dipping into the second deposit, you might be in the clear. Most casinos have systems to track such discrepancies, so it’s worth raising the issue with customer support proactively to clarify and potentially rectify the situation before it becomes an issue with your withdrawal. Transparency about the mistake from your end could work in your favor, showing good faith. Just document your communications and keep records of your transactions and gameplay. If your gameplay didn't breach any terms and conditions, especially regarding deposit limits, you should have a strong case for receiving your winnings without issue.