jQuery Grid Plugin - jqGrid

I am using jQuery Grid plugin with PHP to implement a database management website. For editing database, users can open several tables within individual pop up windows simultaneously. But I found once I navigate one table by clicking the next page button on pager and then switch to another table, if I click the next page button on the second table, the data belong to the first table will be shown on the second table. In other words, the first table data will overwrite the second table data. I guess that is because there is only one copy of data from the latest interaction. One solution is to refresh the second table page again and it will bring the right data back. I am wondering, is there another way I can solve this problem. BTW, I test my website on Firefox, IE, and Chrome and found only Chrome can show the data correctly and will not have this overwriting problem. Thanks a lot for your help.

Bedong