You can correct counting errors by
If the Corrections menu is not visible, tap
to turn on the "Add Tag" mode and tap on the object you want to add a tag to.
to turn on the "Delete Tag" mode and tap the tags you want to delete.
Move Tags - Drag the tag from the current position to the new position.
Use one finger to move tags. Use two fingers to zoom & pan the photo.
More details: Change Counting Sensitivity (Coming soon)
More details: Change Tag Size (Coming soon)
More details: Hide Tag Numbers (Coming soon)