format changes when i change class from onesided to twosided. How to stop this.

Dear Users,

I created a document in onesided class. Since I want to use fancyhdr, to get
chapter name and section name, I changed my document class from onesided to
twosided.  output document format changed. onesided class gave good output
in comparison to twosided format.

Example Problem: In onesided class, I used two tables in onepage. Two table
printed one below onother. But when I change the class to twosided,
onetable at the top of the page and another table at the bottom of the page
are displayed, i.e. two tables are justified in vertical space of page to
cover the whole page.

Please let me know how to handle this. issue.

Thanks and regards
Rajaneesh A
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