Higher fees for Dependent visa

[javy0071]

Hello,

I am on ILR, applying for extension of my wife's dependent visa.

I am applying for 3 years extension, but it's asking me to pay £1636 fees which is for 3 years +.

The dates I am entering for my CoS is:
Start date: 1st Jan 2022
End date: 1st Jan 2025

My wife's current visa expires on 15 Jan 2025

I am not sure why its taking 3 years + fees. Any suggestions? Thanks

[javy0071]

Is this being my cos date is 3 years + 1 day?

Start date: 1st Jan 2022
End date: 1st Jan 2025

End date should be 31st December. Looks like its taking 3 years + fee. But this shouldn't matter because she only needs 3 year visa. What should I do? Thanks