When using a displayed as field on one or more fields make sure the variables Hidden, WsyDetails, and WsyGrid are populated with the field described as the displayed as field.

In other words this means that if you have the following fields

MyField1 displayed as MyDspField1

MyField2 displayed as MyDspField2

and you wish to use the MyField1 and the MyField2 in the variable WsyDetails, Hidden, or WsyGrid you will need to add MyDspField1 and MyDspFiel2 to the variables as well.

Also take a look at the following white paper