[BUG] ... Duplicate Accounts are creating in SFDC

[suresh7ch]

Creating a person account on sfdc org manually and trying to register with the same email id from the storefront with different first name and last name. SFDC is creating the duplicates.

Steps to reproduce the behavior:

1. Login to sfdc org and create a person account manually.
2. Go to storefront and register with the same email id (which was created on step1) and with different first name & last name.
3. open sfdc org and global search with the email id.
4. It shows multiple person accounts.

Expected behavior
First created person account should be updated. System should not create duplicates.

Screenshots
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Your local environment details:

• Node version (node -v): [e.g. v14.17.5]
• NPM version (npm -v) [e.g. v6.14.14]
• SFDX version (sfdx -v) [e.g. sfdx-cli/7.115.1 darwin-x64 node-v14.17.1]

Your remote environment details:

• Salesforce B2C Commerce version: [e.g. 21.10]
• Salesforce Core version: [e.g. 52]

Additional context
Add any other context about the problem here.