Unresolved

Advance settings.

When you use advanced setting as I did today for the British GP as there was a chance of rain.
It rained.
In my adavaced set up I set it to put inters on as soon as there was above 0mm of rain.
1. Should it put my car as soon as it starts raining as it didn't and I pitted the lap after.
2. Should my pit stops automatically after fit inters because although it was still raining it didn't and put softs on at one point.
3. If it does non of the above what's the point of the advanced settings.

Regards
Simon 

First part of advanced  strategy is easy: if there is more water of you chose , car uses  tyres  of afvanced strategy, if water is less, car uses tyre of normal strategy. 
Example
Normale S S S
Advanced: put I whan water is above 1.0mm
If there is 0,9mm or less (it is not necessary that it is raining) when you are making qualify, car uses S
If there is 1,0mm or more, car uses I

If this is not true,  it means that big uodate changed this... i hope no..

So I need to put inters if it's raining at 1.0mm
Is this why when I put change to inters if above 0.0? It didn't change them?
If that's the case surely the 0.0 option should be removed as I thought if you chose that it would immediately change to inters as the first spots of rain fell? 

Thanks it's erm a eye opening read ?
I'm still struggling to understand it fully but hey ho ?