Dynamic Catalog Product Search

Hello everyone!I've came across some problem with dynamic catalog search functionality. I've created an attribute with type "Number", added this attribute into the product structure. Then I've provided default value for this attribute in the product structure. When I perform search in dynamic catalog, Siebel uses only first thousands of a number. E.g. if the default value is 500,000 then Siebel assumes that the number is 500. Because of that when I provide 500 or use < operator (<501) in a search field  the product is found. But if I provide a number that exactly match the default attribute value