normal placement for  FULL ROLLER

Sounds like you only got part of the drill sheet.  If it's a symmetric ball, use their standard drilling sheet here:

http://www.rotogrip.com/products/pdf/reactiondrillchart.pdf

Asymmetric drilling sheet is here:

http://www.rotogrip.com/products/pdf/asymmetrical-drill-guide.pdf
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Telling it like it is.

A full roller tracks between the fingers and thumb hole.  A "normal" semi roller tracks more or less parallel to the fingers and thumb.  There's nothing inherently wrong with being a full roller, but it's almost never taught today.  It's a less versatile release and gives you less drilling options.  There was a high rev full roller that won one of the big eliminator tournaments a few years ago, so anything you do well can be successful.

First tell us something about how you roll the ball and what you want it to do.
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Telling it like it is.