PHUL program, am I overtraining?

I recently joined and jumped on the PHUL after about 1.5 years resistance training. I train the PHUL 3 times a week, so the intermediate version. The choice was based on the previois volume, rather than overloading progression.

After 6 weeks, I can still increase weights or/and reps with form at each workout in almost all lifts. That's great, but it takes 1.5h each time, which I don't really have at the moment, also, my weight is not moving one bit, inspite of trying to eat 2500/2800 kcal.

Could it be sensible to step back to a beginner programing see what happens? Or should I just be happy that I can overload regularly? I like the current program and variation, but am I throwing in tons of sets yet unnecessarily?

Thanks for the input. Great app btw