This is completely normal. Pending card transactions are payments that have been authorised by the card holder but are still waiting for the merchant/ATM providers approval or reversal.
The merchant has 7 days to either claim or cancel the payment. In some cases, a declined card payment or withdrawal may also appear as a pending payment. In that case, the pending payment will be expired automatically by the system and funds will be automatically adjusted to your account within 7 days.