Not every node keeps track of every transaction on the tangle. If it did than we wouldn't be proactively addressing the scaling problem now would we? We would be just the same as all the other projects. A huge part of the reason for this projects existence is to develop a DLT that can prevent double spending without any individual node needing to be aware of more than a small part of the entire ledger. As it happens your node isn't currently aware of the part of the tangle that has your transaction, this is to be expected to happen sometimes and can be remedied quite easily.