MPB vs MPBI discrepancy

Hello,

When I run the following ctl file using MPBI vs MPB, I get different results
between the two, though I believe I should be getting the same output:

*******************************************************************
(set! default-material (make dielectric (index 1.0)) )  
(define-param eps_air 1.0)
(define-param eps_sub 12)
(define-param thickness_air 10.0)
(define-param thickness_sub 1.0)
(set! geometry-lattice ( make lattice
        (basis1 1 0 0)
        (basis2 0 1 0)
        (basis3 0 0 1)
        (size 1 1 10)))
(set! num-bands 8)
(set! grid-size (vector3 16 16 160))
(set! k-points (list (vector3 0 0 0)     ; Gamma
                     (vector3 0.5 0 0)   ; X
                     (vector3 0.5 0.5 0) ; M
                     (vector3 0 0 0)))   ; Gamma

(set! k-points (interpolate 4 k-points))
(set! geometry
        (list
; PHOTONIC LAYER
         (make cylinder
                (material (make dielectric (epsilon eps_sub)))
                (center 0 0 0)
                (radius 2.0)
                (height thickness_sub))

; AIR HOLES IN SUBSTRATE
         (make cylinder
                (material (make dielectric (epsilon eps_air)))
                (center 0 0 0)
                (radius 0.4)
                (height thickness_air) 
          )
         )
)
(run-even)

*****************************************************************
Any help that could be provided would be greatly appreciated.
Mark Herrera