An Alk of 4.69 is a bit high, but nothing to have a heart attack about.
Your Ca levels are a little on the low side, but OK. Usually high Alk leads to very low Ca, but that's not your case.
Re-test the Alk to be sure and keep a close eye on both your Ca and pH.
Check out:
http://www.reefkeeping.com/issues/2004-05/rhf/index.php