Decision on a withdrawn Application !

[Faqasim]

Hello Team,

I have went through the following steps:

4th April 2022: I applied for my son's PBS dependant child (While I was on job X)
10th April 2022: I withdrawn my son's application as I was offered another job Y, and decided to apply for all the family together.

11th May 2022: I applied with all family members (including my son mentioned above)
25th May 2022: I received approval on all 4 applications (main and dependants), and received BRPs.

Today, 7th June 2022, I received a decision on my son's first application made on 4th of April. And I was told in the decision that I will receive a BRP with a shorter period (old job end date, not the new job end date).

What should I do ? Who should I contact to correct this?

Best,

[Faqasim]

Any thoughts?