@Gamer Looks like another mid-year change on the roof-rack. That brochure for 1999 clearly has the longer roof rails present.

The 1998 & 1999 brochures list the roof-rack running the full length of the SUV.

1998 full lineup brochure: http://www.auto-brochures.com/makes/Jeep/Jeep_US20Line_1998.pdf
1999 full lineup brochure: http://www.auto-brochures.com/makes/Jeep/Jeep_US20Line_1999.pdf