multiple grid sorting confusion

[mr]

I have an app with 2 grids side by side, each inside of their own view. Each view is updated every 5 secs with data fetched via http. If I sort grid1, sorting grid2 eventually messes up the sort in grid1. By "messes up" I mean it returns it to the default order used on the initial load. It's as if the sort order was lost on a reload (however it only happens when sorting the second grid).