Search doesn't find all instances of name in iCal on OS X 10.7
Since moving to 10.7, iCal seems to be having some problems with searching. For example, I have a weekly occurance of a student who's last name is Sanchez. I search Sanchez to see how many times I have seen them in the last 3 months (for billing purposes). iCal finds one instance on the 23rd of June, but fails to find another instance on the 17th of June. Same exact spelling.
Any ideas?