If it's brand new, the thermo may be suspect. Put an oven thermometer on the grate and see.
A second charcoal grate turned 90 degrees from the original keeps smaller pieces of charcoal in play.
Turn the center section upside down to keep rain out if you'll be storing it outside.
The WSM is the greatest invention since the Saturn V rocket.
My Boys: Joseph (EI); Andrew (EE); Daniel (EE)
My Toys: 10 WSMs (B, C, DH, DA, EZ, DZ, EO, DU, DR, EE/DU mutt); Brinkman Cimmaron; Chuckwagon Cooker; 4 22.5" Bar-B-Q-Kettles; 2 18.5" Bar-B-Q-Kettle; 1 Red OTS (H); 3 WGAs (EZ, DE, N); 3 SJPs (DT, DR, DR); 2 Smokey Joes (A, K); Genesis Silver C (DU).
"For when democracy becomes tyranny, those of us with rifles still get to vote"