The address you linked has received two payments. If you control the private keys for this address, you do not have to worry. These coins are in your control.
In general, it is not recommended to reuse an address as this is very bad for your privacy (and possibly also for the privacy of your customers). However, there is no technical problem with regard to the later issue of the coins if more than one payment is sent to an address.
You should be able to output the two UTXOs as usual.