I have one list box containing some values, i have enabled 'Always one selected value' property for that list box. But when i view this application through Access point, then this property of the list box breaks sometimes. It allows people to select more than one value and even clear the selected value when we click on the clear selections button.
When the file is mounted on Access Point, does it systematically reload new data into the file? I found a theory saying the "Always one selected value" option gets removed if you perform a so-called "Reduce Data operation". The reason for this might be safety so that the file won't get corrupt with fewer data and thus
prevent the file from beeing opened at all. Unfortunately, I haven't been able to replicate this phenomeno, so further information about this topic is highly desired.
Maybe this blogpost describing a workarorund will help you more than it helped me: