Yes it does but it sets the Machine coords to the value you have set in Home Off, so if that was the opposite to what it should be it could be the reason things got screwed.
It might not have been the issue , its the only thing I can think of though.
Hood

Ok, so i am homing at about Y250 due to the switch position, I should stick 250 in home-off and turn on legacy?

The way I set things up  is have nothing in Home Off, Soft Limits off, home the machine, switch to machine coords and jog to the fully neg limit switch and note the value, that is what you enter into the Home Off box (well  it will be a negative but you want to put a positive in there). You can then home again and jog to the positive limit and note the value. You can then set that as your Soft limits Max and your soft limits Min will be zero. You should now have it all set up and can again home and switch on Soft Limits and hopefully forget about things
Hood

I think i see where its going possibly -

1 - in normal mode where the axis moves, I have a negative number in home off as it tells the axis to move negatively or towards home.

2 - in legacy mode where it does not move, I need a positive number as that is where the axis really is.

Pretty certain i have it set as (1) above and i need (2)

Well that is the only explanation I can think of why Legacy didn't work for you, fingers crossed
Hood

It works fine now - the numbers do have to be reversed if it was previously set for normal homing.

Negative for home offset with axis motion
positive for home offset with no motion / legacy homing.

Glad that was all it was
Hood

What does one do with the PC?

I had thought of stripping it and building into the moveable pendant type control panel but i have doubts about the life expectancy of the hard-disk?

I could possibly stand it in the bottom of the control cab, this means longer USB and video leads.

Any other ideas or go with one of these??

I have my motherboards in the cabinets, on the Chiron it is in the control panel cabinet, plasma it is the main cabinet.
Will post a few pics later if I get a chance.
Hood

You could always fit a SSD if you're worried about hard disk life.