Dear aspirant

The OMR scanner or software will capture what ever you have shaded. Acceptance of wrong circle is generally corrected manually in key fields like roll numbers.  As shaded bubble and written in column will be different so they will cross check that manually and you will get your result.

Most of this only happens rarely people haven't got results in this case.

In future if you shade a wrong bubble you can ask examiner for whiteners to correct it.

All the best