First, I think the rules are badly worded in the Effect Words section. There is no clear distinction between effect word and spell. In all Effect Word Descriptions the text reads "This spell" where it probably should be "This effect word". More so, in the effect word section you can read things like "If the spell has a boost option...". Spells don't have boost options, effect words do.
Some effect words change the spell to require a touch attack when used with the single target word. Let's consider a level 2 spell with the words:
Effect1: Simple Order
Effect2: Flame Jet
Flame Jet states that "If the spell has only a single target, it requires a melee or ranged touch attack to hit and does not allow a saving throw".
Question 1: It's the Flame Jet effect word's save that is changed from Reflex Half to None not the entire spell's save that is set to None, correct? Resulting in a spell with Will negates save for the Simple Order effect and not a spell with no save. RAW I think you could read this as the spell having no save.
Question 2: The spell requires a melee or ranged touch attack since one of the effects require it?
Question 3: Consider a spell consisting of the single target word and two effect words. One effect word requires a melee or ranged touch attack. The other requires a ranged touch attack. The spell requires a ranged touch attack since this is the only overlapping option?