Report layout: two tablixes

Hello guru,

I'm trying to make changes to the standard report 10401(Stub/Stub/Check). My customer has a lot of operations under one cheque. So, I managed to do two tablixes in the body - one shows odd and another even numbers of lines.

But now I need to add extra information (the same for the cheque recipient). When I'm trying to add new tablix under the existing one - it looks awful when I'm printing.
I can't add tablix (and matrix as well) to the header or footer.

Is there only one way - to add textboxes?

Thanks