Issues During Deski to Webi Conversion

HI Experts,

I am New to this MIgration World!!!!!

Recently We have Started Converting Deski to Webi Reports (4.1 sp6).

All Reports are so complex as Webi reports  dont support Macros we find some workaround .but after migrating we are getting lot of Data mismatch issues either less data or more data what could be the  reason?

Some of the reports we couldnt able to fix it.feeling strange and confused  and frustrated about data mismatch

Can any one Suggest me what we need to do workaround for this kind of data mismatch .any steps or checks need to follow during this migration

which steps need to follow during migartion and what kind of checklist we need to follow

any forums or links can also be shared

any help would be highly appreciated

Thanks,

Varun