Picking strategy

Dear Experts,

Here , when i am doing the Picking , system suggests the Bin as per strategy but total quantity of that Bin put into the Pick qty instead of the desired qty

Ex.

Outbound qty 100 . Picking is required 100 qty . Bin stock qty 105 .

Then when TO gets created , the stock screen shows Pick qty is 105 and stock for putaway is 100

When i am confirming the TO , then only system pick 100 and Putaway 05.

But i want such that, when i am picking the qty 100 ,the 05 qty is available in same bin for further Picking.

So please suggest me.