2011 Ram 2500 towing a 5er

I have a ram 2500 5.7 hemi 3.73 and am confused some on the towing capacity. 8600# is what its rated at that just seems awful low for a 3/4 ton truck? The newer 1/2 tons will tow more than that. It tows my small 23 foot Taho Light trailer just fine as it just weighs around 5000#. I am looking to go full time next year and wanting a 5er for the added storage,and 4 season package, but looking at the so called 1/2 ton towable 5er's my 3/4 ton doesn't have the capacity to tow them. Am I missing something ? Not reading weights and numbers right?
Thank's Mark