Welcome!
Something we don't know (or I missed it when I read) is how they measured the weight. Did they weight the truck and trailer together, then subtract the curb weight of the truck?
As Bill said, the dry weight was without options. Right now it's heavier by about 600 lbs. An awning could be 50 lbs easy, the battery another 50-60 lbs. The 2001 probably has a side AC which is going to be close to 100 lbs. A slide lounge or dinette adds 200 lbs.
I know this is for a 2002, but it gives you an idea of how options can change the weight:
https://www.nadaguides.com/RVs/2002/Trailmanor
The current dry weight of a 2720 with the slide optioin from Trailmanor is 3040 lbs. I'm not sure what they didn't include in the 2001 era dry weights, but the general construction of the Trailmanor hasn't changed significantly.