My clicks turn up as circles

Hi,

It is actually a feature. You must've turned it on by accident. Here's how you can turn it off.

1. Go to Settings.

If you have Developers option already, skip Step 2 & 3.
2. About phone
3. Tap MIUI version several times until it says "Congratulations, you are now a developer!"

4. Go back to the Settings app homepage and select Additional settings.
5. Go to Developer options.
6. Find the "Show taps" option and turn in OFF.
7. Done.

I hope this helps!