Am I doing something incorrectly?

[Rerouting]

I am applying for my mom's visitor visa. She is currently retired.
Following is the list of documents I am getting. Not sure why it is so small and why they are asking for the Employer letter??



Supporting documents
Optional documents

Status	Document name	Add or change file
Not uploaded	Passport/travel document	No file chosen Add file

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Status	Document name	Add or change file
Not uploaded	Consent personal information	No file chosen Add file
Not uploaded	Employer letter (current) A copy of a letter from the employer in Canada. This letter must state that the company will hire you to work in Canada for a specific period of time. The letter must be printed on the company's official letterhead and include your name, the details of your employment in Canada, and the company's contact information.	No file chosen Add file
Not uploaded	Additional documents	No file chosen Add file