@Sameer_mobin
I think it is a good sign. Although this is the first time I am seeing this kind of jump to background check in progress for an outlander.
We didn't submit schedule 4 also and haven't gotten a request to submit it.
Why do you want to get schedule A?
They only request for schedule A if something is not clear about some parts of your history, or missing months, or not properly explaining visa rejections/deportation when you submitted your app.
I got schedule A request for some four months in 2012. They wanted details of what I was doing. I answered yes to a statutory question and they didn't even care about it. My spouse who is the PA also answered yes to One of statutory questions and didn't even get schedule A request, at least not yet.
So relax and let's see what next week brings for you.