Rounding issue after CTM run

Dear Gurus:

        I find a strange result for the rounding of SAP APO. In the IMG setting, I check the UoM "EA", and there is no decimal place set here (Blank). So supposedly, after CTM run, CTM should not suggest any planned orders with decimal places. But it happens. And I also check my PPMs, there is no decimal values there.

       So, I set "Round order quantity" in the technical setting of CTM profile. But the result is still weird. For example, before set this indicator, system suggest me to build 19.5 EAs for finished goods and use 39 EAs for semi-finished goods. (In PPM the consumption qty is 2). But after set rounding, system suggest me to build 20 for finished goods, but still use only 39 EAs for semi-finished goods.

       Is there any setting I missed in the CTM or master data? Thanks for your advice.

Regards,

Scott Chen