When searching in range on custom integer field for multiple records, field is ignored and all records are returned

Here's what I did to reproduce:

• Administer CiviCRM >> Custom Data >> Add Set of Custom Fields
• Set Name -> CUSTOMSET
• Used For -> Individual, - Any -
• Used For -> Individual, - Any -
• Does this Custom Field Set allow multiple records? -> Yes
• Display Style -> Tab
• Save
• Custom Fields
• Field Label -> OPTIONS
• Data and Input Field Type -> Alphanumeric, Advanced Multi-Select
• Option Type -> Create a new set of options
• Multiple Choice Options -> Opt 1, op1
• Multiple Choice Options -> Opt 2, op2
• Multiple Choice Options -> Opt 3, op3
• Required? -> Yes
• Is this Field Searchable? -> Yes
• Save and New
• Field Label -> YEAR
• Data and Input Field Type -> Number, Text
• Required? -> Yes
• Is this Field Searchable? -> Yes
• Search by Range? -> Yes
• Save
• View Contact >> CONTACT1 >> CUSTOMSET >> Edit CUSTOMSET
• OPTIONS -> Opt 1, Opt 2
• YEAR -> 2001
• Add another CUSTOMSET record
• OPTIONS -> Opt 1
• YEAR -> 2002
• Save
• View Contact >> CONTACT2 >> CUSTOMSET >> Edit CUSTOMSET
• OPTIONS -> Opt 1, Opt 3
• YEAR -> 2005
• Save
• View Contact >> CONTACT3 >> CUSTOMSET >> Edit CUSTOMSET
• OPTIONS -> Opt 2
• YEAR -> 2003
• Save

• - - -

• Advanced Search >> Custom Fields >> CUSTOMSET
• OPTIONS -> Opt 1
• YEAR -> 2000, 2003
• Search

Expected Results: CONTACT1
Actual Results: CONTACT1, CONTACT 2

• - - -

• Advanced Search >> Custom Fields >> CUSTOMSET
• YEAR -> 2002, 2003
• Search

Expected Results: CONTACT1, CONTACT 3
Actual Results: [All Contacts]

There is no easy work-around that I can find.