I have only smoked a half a dozen times. I have a Charbroil H20 smoker. I use lump charcoal. I have somked only flank steak till today. I have a rack of spear ribs going. I cut in half and put one on the top rack and one on the bottom rack. I am keeping the temp at around 225. I have two temp probes going. The bottom ribs have been consistently 5-7 degrees lower than the top rack. I'm guessing because heat rises so the top ribs should cook faster. If that is incorrect, please let me know. Additionally, with all of my smokes, it seems that there is a pretty6 consistent temp rise until the last 20 give or take. It just hans what seems for ever. I go crazy checking the batteries, bringing the receiver out to the bases to see if I traveled to far into my house, have raising the smoker temp by at least five degrees. I have never actually reached my target temp. It has always felt like it was going too long based on the guides that I have read here. Being that it was steak and I usually eat it med-rare I felt ok with it. However, this is pork and I am getting neverous. The ribs guide here says 3 hours of smoke and 3 more to reach targe temp. I am at seven hours and top rack reads 155 and bottom rack reads 147. Smoker temp is and has been 130ish for some time now. Do i leave them on until 170 or do I pull them off?