Here's a shot of my 2015 195RB Baja tub - you can see the caulk around the top of the tub. I also have a trim seal up the corner of the wall instead of caulk. Sure looks like something was missed on yours.
TT: 2015 Jay Flight SLX 195RB Baja Edition
TV: 2014 RAM 1500 Bighorn CC, 5.7L Hemi, 3.21, Factory Air Suspension/Tow Pkg, Andersen WD/SC