"Vlan tag drop -- Number of tagged frames dropped that do not match the VLAN tags
configured on the interface.
Vlan untag drop -- Number of untagged frames dropped on an interface that is configured
to be part of a VLAN"
So it looks like you have a large number of frames that are tagged for some other VLAN that is not a part of that interface and you have a smaller number of frames being dropped that are simply not tagged (but should be since the interface is meant to be part of a trunk). If I had to guess here I would venture that maybe one or more of the switch ports in your etherchannel is not configured properly since both of these things are happening. Perhaps one of your filer interfaces is plugged into a port that is actually part of a different etherchannel?