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I dont't want to argue about the corectness of the 
behaviour, although I maintain my position. The issue is 
not of corectness but of usefulness. What use is to match a 
property against a list of values in an 'and' fashion. For 
example, given a value of 1,2 what property can match the 
value 1 and 2. The condition will be always false. Matching 
1 or 2 is both correct and useful.
By the way how do you filter a property to have a value of 
either 1 or 2 ?