Here is what I believe is the problem. Cross Tab reports are not the tool to use for this solution. They dont give the flexibility you need.
When I went back through the posts to your question forum member Savan essentially gave you the same solution I was going to offer. So look at that post. However, you will need to create a new report and abandon the crosstab design.
Savan lists 3 levels of grouping
Grp 1 Center
Grp2 Acct_Main
Grp3 Acct_Sub
Follow Savan's data link suggestion and group suppression suggestions.
I am not sure where your remaining details come from but if you take Savan's solution you should be close enough to work out the rest of the design.
I do a lot of accounting style reports and find this type of design gives me what you are looking for.
Regards,
John W.