I did not know there were 3 types of fruit to plant in orchard until after I had planted 2 of the tall tree with orange fruit. Now I have no room to plant a banana tree...will this cause issue later?

No, whatever fruit you have it's the same and there is 1000 points of food at the beginning!

I have one tribe with only banana trees and the other one with a banana, a mango and a papaya tree. I didn't see any difference.

I love the banana trees so in one of my tribes I made sure I had three of them. Yey!

My favorite is the mango but my second favorite is the banana & my tribe has 1 banana & two papaya