Can someone explain the FPS on this game

[animapain]

Yeah I've noticed weird FPS things as well. The big one I've seen is despite seeing it say 30-45 FPS for me, the game doesn't seem to be completely smooth. Sort of like there's micro freezes between every frame or something. But for that framerate it seems like it should be smoother. Basically it feels like 20-25 FPS vs the 30-45 it displays. So it could just be reading the FPS wrong, who knows.

I know the benchmark is not a true reflection on the game I should be, according to that, averaging around 103 FPS.

Here's my score from yesterday.
FINAL FANTASY XIV: A Realm Reborn Official Benchmark (Character Creation)
Tested on:05/09/2013 18:46:18
Score:11802
Average Framerate:103.942
Performance:Extremely High
-Easily capable of running the game on the highest settings.

Screen Size: 1920x1080
Screen Mode: Windowed
Graphics Presets: Maximum
General
-Enable HDR rendering and improve overall graphic quality. : Enabled
-Disable rendering of objects when not visible. (Occlusion Culling) : Disabled
-Use low-detail models on distant objects. (LOD) : Disabled
-Cache LOD data only when necessary. (LOD Streaming) : Disabled
-Real-time Reflections : High
-Edge Smoothing (Anti-aliasing) : FXAA
-Transparent Lighting Quality : High
-Grass Quality : High
Shadows
-Self : Display
-Other NPCs : Display
Shadow Quality
-Use low-detail models on shadows. (LOD) : Disabled
-Shadow Resolution : High - 2048p
-Shadow Cascading : Best
-Shadow Softening : Strong
Texture Detail
-Texture Filtering : Anisotropic
-Anisotropic Filtering : x16
Movement Physics
-Self : Full
-Other NPCs : Full
Effects
-Naturally darken the edges of the screen. (Limb Darkening) : Enabled
-Blur the graphics around an object in motion. (Radial Blur) : Enabled
-Screen Space Ambient Occlusion : Strong
-Glare : Normal
Cinematic Cutscenes
-Enable depth of field. : Enabled

System:
Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
8104.613MB
NVIDIA GeForce GTX 670(VRAM 4038 MB) 9.18.0013.2680

Benchmark results do not provide any guarantee FINAL FANTASY XIV: A Realm Reborn will run on your system.

FINAL FANTASY XIV: A Realm Reborn Official Website http://eu.finalfantasyxiv.com/?lang=uk
(C) 2010-2013 SQUARE ENIX CO., LTD. All Rights Reserved.

As you can see my Rig is more than capable,yet in-game having 42 FPS looking at a wall is just crazy.