[PinkMilk]

The point of child styles is that when editing its parent these changes are automatically made to the child as well.
If your 2nd style is as you say the same only a different colours you should make a child of the 1st style and recreate your 2nd style.

I realise this will be frustrating because you have already started on the 2nd style but in the long run it will save you a lot of time, otherwise you will have to make template edits to any and all parent styles.