Do movement options that are limited "per turn" apply over the whole turn, or should they be interpreted to be on a per-action basis?
Where specifically does it say a 5-foot step is limited "per turn"?
You are correct movement options that are limited by turn apply over the whole turn.
I cannot Make a standard move, and then take a partial attack action with a 5-foot step. This would break the rule of moving and taking a 5-foot step in the same round. This I am not arguing.
But, by definition, a 5-Foot Step “does not count as a move in combat”; therefore you have not moved when it is taken. Thus allowing a second 5-Foot Step with your partial. Ex: A 5-Foot Step, then a full-attack action, then for my partial, a 5-foot step and a single-attack action.
Where specifically does it say a 5-foot step is limited "per turn"?
You are correct movement options that are limited by turn apply over the whole turn.
I cannot Make a standard move, and then take a partial attack action with a 5-foot step. This would break the rule of moving and taking a 5-foot step in the same round. This I am not arguing.
But, by definition, a 5-Foot Step “does not count as a move in combat”; therefore you have not moved when it is taken. Thus allowing a second 5-Foot Step with your partial. Ex: A 5-Foot Step, then a full-attack action, then for my partial, a 5-foot step and a single-attack action.