3
It is the issue off XOOPS 2.0.13.* and below.
The Block layout no mather what weight you assign is as following...
center-center blocks
center-left block - center-right block
Frame-Left block - Frame-Right block
By editing your theme.html you can put the right frame block under the center left and right blocks.
On my site i installed the multiblock hack.
Which make it possible to create more blocks then the orignal XOOPS can do.
Her is the link to that topic:
Click here