Ship Strategy & Fleet Strategy in strategic combat-how does it work?

[MegaTrain]

I've known for a while that you can adjust the Formation/Strategy of a fleet by choosing one of the pre-defined strategies.
I only discovered recently, however, that you can apply different strategies to individual ships in the "Design" window and also edit strategies under "Empire Status." I just want to make sure I totally understand what I'm doing when I customize these strategies. (All questions assume strategic combat--PBW game)

1. If I apply a specific strategy to an existing ship Class in the Design window, does it apply to existing ships of that design? Or just to brand new ships created after I've specified the strategy?

2. If an individual ship has a strategy assigned, does it only have an effect when the ship is solo, or does it also do something when it is part of a fleet? i.e., do fleet strategies override ship strategies?

For editing strategies in the "Empire Status" window:

3. How does "Primary movement" interact with "secondary movement"? Does it pick the one that seems the most convenient at the time? Will "Maximum Weapon Range" and "Don't get hurt" together work like I think? (Creep into range, shoot, and retreat until weapons are ready to fire again)

4. If I select "Ships" under "Types that break formation", then will all my ships flee for the corners? Or will they simply be free from the bounds of the assigned formation to kick butt at will. (I hate it when ships move out of firing range just to maintain their position in the formation.)

Thanks for your help...

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-MegaTrain-
Athlon 1.3 GHz running at 1.6 GHz on an iWill KK266