Some beginner questions

So I'm about to finish my first fermentation for my kombucha brew and I have a couple of questions:

The starting scoby i got has settled on the bottom of the jar, the new scoby has formed on the top. Which one should I use for the next brew? Should I just keep both?

When adding fruit to 2F, won't the fruit itself become mushy/nasty after a couple of days? Should I remove them after a couple of days?