Please note that your "Available Balance" will not update immediately. This is normal so don't worry, this is because the wallet enforces a 10 block (20 minute) waiting time before allowing you to spend recently received funds. The reasons for this are interesting and complicated but the TLDR is that as a privacy coin the wallet needs to be mindful of statistical attacks, and spend transactions that occur immediately after receiving funds are easily traceable, which reduces the privacy of all the transactions the blockchain (not just your own transactions).