Block Configuration Form Returning Unexpected Value

I'm trying to build a block configuration form. Here's my blockForm code:

  public function blockForm($form, FormStateInterface $form_state) {
    $form['resolve_ip_addresses'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Resolve IP Addresses'),
      '#default_value' => $this->configuration['resolve_ip_addresses'],
      '#description' => $this->t('Resolve IP addresses to return host names for log file entries.'),
    ];

    $form['log_file_path'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Log File Path'),
      '#default_value' => $this->configuration['log_file_path'],
      '#description' => $this->t('The full file system path to the log file to be parsed.'),
    ];

    $form['log_file_format'] = [
      '#type' => 'radios',
      '#title' => $this->t('Log Format'),
      '#default_value' => $this->configuration['log_file_format'],
      '#options' => [
        0 => $this->t('Common Log Format (Apache)'),
        1 => $this->t('Combined Log Format (Nginx)'),
        2 => $this->t('Other'),
      ],
      '#attributes' => [
        'name' => 'field_log_file_format',
      ],
    ];
    $form['custom_log_format'] = [
      '#type' => 'textfield',
      '#size' => '60',
      '#placeholder' => $this->t('Enter log format'),
      '#default_value' => $this->configuration['custom_log_format'],
      '#attributes' => [
        'id' => 'custom-log-format',
      ],
      '#states' => [
        'visible' => [
          ':input[name="field_log_file_format"]' => ['value' => 2],
        ],
      ],
    ];

    return $form;
  }

The form seems to be displayed properly. I'm having an issue getting the value for the "log_file_format" field. Here's my blockSubmit code:

  public function blockSubmit($form, FormStateInterface $form_state) {
    $this->configuration['resolve_ip_addresses'] = $form_state->getValue('resolve_ip_addresses');
    $this->configuration['log_file_path'] = $form_state->getValue('log_file_path');
    $this->configuration['log_file_format'] = $form_state->getValue('log_file_format');
    $this->configuration['custom_log_format'] = $form_state->getValue('custom_log_format');
  }

The problem is that the value returned from $form_state->getValue('log_file_format') is always 0 (zero), no matter what value I select on the form and save the block. All of the other values are correct. Interestingly, the "custom_log_format" field correctly switches visibility on the form when the "Other" option (value 2) is selected. What am I doing wrong here?

The fix suggested by @unusedspoon took care of the radio element value problem. The form element value was properly set after removing the 'name' => 'field_log_file_format' attribute from the 'log_file_format' form element - but that broke the visibility toggle for the 'custom_log_format'. The fix for that was to change ':input[name="field_log_file_format"]' to ':input[name="settings[log_file_format]"]'.