A family of Microsoft word processing software products for creating web, email, and print documents.
The IEEE referncing Style lays out the data in a table. It would appear you've somehow managed to reduce the table's first-column width to a dimension too narrow to accomodate the reference #s, which should appear as [#] all on one line, and that the second column, which uses the Bibliography Style, has had paragraph justification applied. The layout might look more acceptable if you change it to left-aligned.