That temperature reading is from the MAK thermocouple location Drew so your not going to get the exact same reading unless you put the Thermoworks thermocouple in the same location as it.
That is why they always say "Know your cooker" 
Mike is right. The temp sensor represents an overall temperature of the grill, not any specific spot in the grill. There will always be a difference between the lower & upper levels.
Here are a few things I've noticed with our MAK:
1) This temperature offset always seems worse during cold weather when the MAK is pulling in cold air. I just bump the setting up an extra 5 - 10°.
2) A dirty temp sensor can play a HUGE role. I had a situation recently where the MAK wasn't getting up to temp and kept dropping, BUT it had been a while since I'd cleaned the temp sensor. After a good cleaning with a Scotch-Brite pad it was back to business as usual.
3)Bad pellets not burning like they should will definitely cause any pellet grill to struggle. I had a couple bags that had picked up moisture and didn't realize it until after my MAK was struggling like crazy to get up to and hold temp. After inspecting the bag, the pellets seemed dry, but when I saw some near the bottom of the bags were swollen I knew that they'd picked up moisture at some time. After changing the pellets the MAK was happy again.
One bag went to my friend who has a Masterbuilt Electric smoker (they worked fine for him) and my wife used the other bag as mulch in the flower beds.
