As long as the recipe is for 5 gallons & you're planning on doing a full 5 gallon boil, I never adjust my hops, even if the kit instructions tell you to boil 2.5 gallons & top off your primary to 5 gallons. I would only adjust my hop schedule if changing the final recipe yield...for example, if going from a full 5 gallon recipe to a scaled-down 2.5 gallon test batch or if you wanted to double a 5 gallon recipe to 10 gallons.
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Primary 1: n/a
Primary 2: n/a
Secondary 1: Port BA American Sour w/Raspberries
Secondary 2: Baltic Porter
Now On Tap: New Zealand IPA, Belgian Dark Strong w/Anise & Cinnamon, Imperial Red Ale
Upcoming Brews: Port BA American Sour w/Cherries, Doppelbock, Belgian Golden Strong, Peanut Butter Imperial Porter