Why are my deposit funds not reconciled yet?

Deposits may be captured by Adyen for bookings with arrival dates further in the future.

The amount of the deposit is withheld by Adyen in order to cover for potential liabilities due to processing of payments.

Actually the money is already yours however it is under escrow on the Adyen balance until 2 days before arrival.

On the Sales to payouts page under Finance you can see an overview

• Pending
  The pending balance is the gross amount of sales and refunds that you haven't got paid for, as they have yet to be settled by the respective card scheme or payment method.
• Next payout
  The payable balance is the current amount to be settled to your bank account at the next moment of payout. This amount will change over time if sales, refunds, chargebacks and other adjustments are being processed.
• Reserve
  The balance within the reserve is added to your in-process funds available for refunds/payouts
• Reserve threshold
  Reserve threshold defines the Reserve balance you wish to keep on this account. The Reserve will be filled up to this threshold before Adyen settles into your bank account.
• Deposit
  The amount of the deposit balance is withheld by Adyen in order to cover for potential liabilities due to processing of payments.

More explanation can be found in the this article or this video