Header and Data Columns alignment not in sync in 2.5.5

Hi

I have 84 Columns , and initially displaying 50 Columns. This is Working fine. And if i click expand button on the page then i am displaying 70 columns. In this case Heder and data column alignment is going wrong.

This worked fine in 2.0 version. when i moved to 2.5.5 version i am getting this issue. What could be the reason?

Can you help on this.

Setting Dynamic widths for the columns is giving issue when we are hiding and showing columns.

Can avoid by replacing
obj.getCellTemplate(colIndex).setStyle("width","80px")
with
obj.setColumnWidth(columnWidth,columnPosition);

Suree