Well now…
You can most certainly overfill your engine oil. If the engine oil is too full, the PCV valve, part of the emission controls, is most likely going to intake oil mist instead of oil fumes. This may cause gumming up or failure of the PCV valve.
I’d remove some since the fluid will expand when hot, and it’s possible it’ll reach seals that aren’t designed to be flooded and might leak or fail under higher than designed pressure. Oil is cheap
I would drain out enough so that it shows right at the cold full line while the vehicle is level.The worst part of over filling the oil is that your engine will be breathing oil mist, and that will most certainly contribute to and cause early failure of catalytic converters. Without a doubt.
Regarding the dented oil filter…
Small superficial dents, depending upon where they are, may not be the end of the world. Minor crushing with filter wrench pliers may not be an issue.
But if you deeply scratch or gouge the metal structure of the oil filter, the filter will most likely fail… oil filters are pressurized when the engine is running. And they return to un-pressurized state when the engine is not running… the pressure/non-pressure condition creates minor oil canning (flexing) of the housing. Any deep scratch or gouge will become the point of focus for structural failure.
Cheap insurance to just replace the damaged oil filter.