Flying from Edinburgh to Reykjavik on an A20N, and Little NavMap is warning me that it's going to ignore the speed and altitude at two waypoints where SimBrief has me flying FL380 instead of the starting FL240, and LNM instead has the whole flight happening at FL240, without explaining why it's ignoring those instructions.

SimBrief:

EGPH/24 N0366F240 GOSA1C GOSAM DCT GOW L602 BRUCE/N0446F380 DCT GOMUP/M076F380 DCT BREKI DCT BASLU BASL2K BIKF/19

LNM:

Flight successfully downloaded. Reading of route description successful.
Ignoring speed and altitude at waypoint BRUCE.
Ignoring speed and altitude at waypoint GOMUP.

Flight plan from Edinburgh (EGPH) to Keflavik (BIKF).
Distance without procedures is 949 NM.
Using cruise altitude 24,000 ft for flight plan.
Depart using SID GOSA1C and runway 24.
Arrive using STAR BASL2K and runway 19.
Land at runway 19.
Alternate airport is BIAR.

Route description:
EGPH/24 N0366F240 GOSA1C GOSAM DCT GOW L602 BRUCE/N0446F380 DCT GOMUP/M076F380 DCT BREKI DCT BASLU BASL2K BIKF/19 BIAR.
Found 11 waypoints:
EGPH GOSAM GOW CLYDE FYNER BRUCE GOMUP BREKI BASLU BIKF BIAR.

Am I missing something as to why this is happening?

SimBrief returns flightlevel 240: 
EGPH/24 N0366F240 GOSA1C GOSAM DCT GOW L602 BRUCE/N0446F380 DCT GOMUP/M076F380 DCT BREKI DCT BASLU BASL2K BIKF/19

LNM does not do step climbs. It always takes the initial altitude. This is a limitation of the LNM elevation profile. Adjust the altitude manually while flying if needed.

Alex

Got it, thanks for letting me know!