MattyNic0: Just played a tournament and I had 1 ball remaining (slow meter) so I purchased another pack of a similar but not the same type. On the 7th hole I lost my 1 ball in the drink and expected the game to automatically start on my new pack, but it didn't, it reverted me back to the standard ball with a faster meter. There was no way I could find to go to edit equipment and choose my newly acquired balls. Or is there, if not then why not?
You can only replace a ball mid-round with the exact same ball, not a ball that is "similar". If you have the same ball in your inventory, but in a different color, or with a vapor trail, it's not the exact same ball.
MattyNic0: Also I've noticed when you finish 18 holes the game only gives you a readout of the last 9. Why can't I see all 18?
If you put your mouse pointer (or finger, if on mobile) in the middle of the scorecard and drag to the right, you can see your 1st 9 holes.
Hope this helps.