Material Tab on VL10C selection screen

Dear Experts,

I use VL10C to generate delivery for my Sales order, but seems the selection criteria maintained in 'Material Tab' of VL10C not working as expected. Could please kindly advise on this?

For example:

Sales Order 1234567      
item 10-    Material AAA       Storage location 1000     Plant 1000

Then i use VL10C, selection criteria maintained as below:

Sales Order Tab -  Complete Delivery 'X'

Material Tab - Plant '1000'

                     Storage Location '900'     Excluded Ranges: 1~899 and 901-9999

So it looks i have already excluded storage location 1000 in VL10C.

Then i ran VL10C, but still Sales order 1234567 - item 10 was selected by system and generated Delivery under storage location 1000.

I just want to know why system still generate delivery for Sales order 1234567 even the storage location 1000 already been set as excluded under Material Tab of VL10C.

Hope kindly clarify.

H