DataServiceQuery LINQ query ToList() return copy of last entry

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C#

LINQ

OData

Dear reader,

I'm currently trying to access the results of a SAP Gateway ODATA service but one particular method doesn't seem to comply with .net result expectations. The code below is what I'm using and the result is that all the entries are filled with the values of the last entry. LINQPad shows two results; in the richtext view it gives me the correct values of all the entries and the Datagrids result resembles the problem I have in my code (multiple copies of last entry)

CRM_Open_Dagen.ZCRM_EVENTS01_SRV.ZCRM_EVENTS01_SRV ZCRM_EVENTS01_SRV =
    Data.ZCRM_EVENTS01_SRV.Get_ZCRM_EVENTS01_SRV();

DataServiceQuery<CRM_Open_Dagen.ZCRM_EVENTS01_SRV.SOptions> SOptions = ZCRM_EVENTS01_SRV.SOptionsSet;

List<CRM_Open_Dagen.ZCRM_EVENTS01_SRV.SOptions> ListSOptions =
    (from s in SOptions
     where s.Show == Category
     select s).ToList();

return ListSOptions;

Anyone an idea how:
1) I can check the syntax of the odata result?
2) How I can tackle this problem?

Best regards and thanks,
Rémy