I have Soundforge, protools, and goldwave. I'm just not sure how to adjust the level exactly without very tedious work. I've tried but it results in odd jumps since it's not aligned.
A volume envelope should allow you to smooth it out. I always found it easiest to zoom in, apply the volume envelope visually, then verify the results with my ears. Even if the alignment isn't perfect, the envelope should allow a gradual enough change that it reduces or removes the "odd jumps".
Now, in all my cases except one, I adjusted levels up, or down in the field - and not both. If you adjusted both up and down, then it's definitely more difficult, and in that case it gets much more tedious. The "odd jumps" should give you an indication of where you need to smooth things out. I'd start with the last odd jump before the levels stabilize, and get it smoothed out. Then move to the next previous jump. And the next, etc. That's how I did it in the one case I made level adjustments both up and down.