Subreport out of synch when manually jump page numbers

I have a main report with a subreport, linked Child-Master.

My report & subreport works fine if I use the Next page button. It
also works fine if I manually enter the NEXT page number.

But the problem is when I manually enter a page number that is not
next in line (jump 2 or more pages). My main report jumps to the
correct number, but my subreport does not jump -- it only increments
by one.

Here is the situation

Load report

Month = 1
Report = 1
Subreport = 1 (Good)

Hit next page button

Month = 2
Report = 2
Subreport = 2 (Good)

Enter the number 8 to jump pages

Month = 8
Report = 8
Subreport = 3 ***PROBLEM***

Hit next page button

Month = 9
Report = 9
Subreport = 9 (Good)

Enter the number 10 to go to next page

Month = 10
Report = 10
Subreport = 10 (Good)

Enter the number 6 to jump pages

Month = 6
Report = 6
Subreport = 11 ***PROBLEM***

Any idea why my subreport would get out of synch when I try to
manually jump page numbers?

Thanks,

Chris