Hi,
Since You are using 2 sections & each section contain pie chart , You need to see the properties of Sections .
Like Its Bottom Padding , Minimum Height , Minimum Top Offset .
Also try to set the pie chart size( Height ) big enough that 2 pie charts will be set on 1 page.
Like for Testing Keep it as small as possible , but you should be able to see figures (Say 7 X 7 if you are using A4 Landscape(height around 19 & width 28 ) ) .
& If You want to Move your Pie chart use Relative Position (In Chart Properties --> Layout ).
It will give you only two options Left of section & top of Section.