Not necessarily. Our company switched credit card processing services a while back. We were promised lower fees and overall costs, and we fell for it. The new company sucked, and at times held payments to us. Nothing like this length of time, but they held a payment of over $20K and it took days for them to transfer the funds to us after our client's card was charged.
It took our office manager weeks of emails and phone calls to get us out of our contract with that bunch of scam artists and back to our original service.
Not saying I know what happened here, just that the card processing service CAN hold a payment, without reason.
If you are tempted to change your service, check them out carefully. There are some scammy ones out there.