Display file not showing intended Space between headings

Hi,

I have a display file which has a 6th sequential heading defined as a
subfile.

The problem with this display file is that for the first 4 headings it
shows the gaps among these headings as defined in the DDS but after the 4th
heading intended space is not shown when this display file is called from a
rpgle program and the intended space is visible among the above rest 4
headings and even after the 5th heading and before the 6th heading in this
display file.

I tried giving space for 5h heading after the 4th heading in the DDS of the
Display file but even after increasing the space of one and even of two
lines in my one by one attempts , still the 5th heading is at the same
place and I don't see the intended space between 4th heading and 5th
heading.
I can see the intended space even after the 5th heading and before the 6th
heading but it does not show the intended space between the 4th and 5th
heading.

What could be the reason? Is it an RPGLE program or some flaw in the DDS of
this display file itself?

If this is in the DDS of the display file only then why is it showing
correct space when I open it using 17 and then 12 against SFL type then I
am able to see correct space as defined inside the DDS of this display file.


Thanks.