Employer on Profile - Mismatching
Matching to existing organisations is determined by the Unsupervised rule for Organisations - go to Contacts &gt; Find and Merge Duplicate Contacts then click Edit Rule on the rule marked Unsupervised to see how it is currently defined.  You can change the existing rule, or create a new one and set its usage to Unsupervised.

Alternatively, you might find this extension useful: https://civicrm.org/extensions/public-autocomplete-of-organisation-names