have a look at the following related thread
misdirected packets are packets that should have been punt (ed) to the main CPU = process switched for example for the presence of IP options like router alert and so on.
They are dropped as a form of protection of the main cpu from possible DoS attacks.
In your case they are just a few and should not be causing the issues.
Be aware that if you have WIFI users and you have a WLC you need to trust the port the WLC too, because it changes an internal field in DHCP request the gi_address and this causes DHCP snooping to drop client DHCP requests coming via the WLC.
Hope to help
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