On importing defect sheet with test case ID, in traceability the defect shown under requirement

While importing the defects, I gave the test case ID and it got linked but in the traceability matrix, the defect is not shown under Defects column instead its showing under Requirements column. When manually the defect is created and linked, its showing correctly under Defects column in traceability matrix, the problem occurs only for the imported defects from the Defect list CSV file.