Sponsor Ticked Maintenance refusing a letter for wife

[JS28]

Hi All,

I got my tier 2 visa this month. My sponsor is A-rated and they ticked the maintenance to make my case strong.

Now, i am trying to call my wife over. Even though I have the funds, I thought I'd get a letter. But the HR director is not agreeing to maintain a dependant.

CAn anyone here please please answer my queries?
1.) I rang UKBA today about the maintenance and they said that if the main applicant is covered in the maintenance, the dependant will be as well regardless of whether they apply the same or after. IS this correct?

2.) is the maintenance for the first month of employment or first month of the visa?

3.) Can I use the letter after the first month of my employment?

4.) What do they need to put in the letter? Any template?

Please help me my partner is applying next week

Thanks