Multiple grids interference

I have two grids on the same page, both pulling their data from the same XML file (one displays all the data, the other displays only data selected by the user). The data needs to be refreshed (reloaded from the XML) every 5 minutes, but every time I refresh one grid, the other goes blank. The grid ID's are each unique, so the conflict must be in the table as far as I can tell (table.refresh, maybe?). Is there a way to reload the data without breaking the grids?

NOTE: The problem also occurs when I initially populate the grids, not just when I reload the data.

Nevermind; I just figured this out.

OK... how you figured out would help someone else in your situation trying to seek help on this board. Would you be kind enough to share how you 'figured it out' ?