ajax reload

Hi,

I have a zone where I add/remove dynamically a list of object,
the object is made of a boolean that is associated with a t:checkbox. When
I modify the checkbox (check/uncheck) and then update the zone (because
list of objects change : add/remove) the value of checkboxes come back to
there original values.

So, on ajax reloading a zone, it seems values modified are not saved.

Is this normal behavior ? How can I keep the modifications made in the
checkboxes when reloading the zone ?

Thanks.