I think I have an explanation, cuz I got a CTD when I tried adding something into my weapon. I'm capping at 34, but I think two of my skills have something of an overlap: element crit and status crit. See, they're technically active, but by virtue of the fact that you can only actually utilize one or the other (even with bow, where the status coating cancels out the element), the game shows them both as active but is only turning on one at a time. At least that's my best guess.
To be thorough, here's the skills on my CB (I was pretty meticulous when planning this list)
1-Hasten Recovery
2-Super Recovery
3-Critical Element
4-Mind's Eye/Ballistics
5-Critical Status
6-Punishing Draw
7-Protective Polish
8-Non-Elemental Boost (this swaps out for whatever element/status is applicable for the weapon)
9-Defense Boost
10-Health Boost
11-Fire Resistance
12-Water Resistance
13-Ice Resistance
14-Thunder Resistance
15-Dragon Resistance (I wanted the defense boosts, sue me! lol)
16-Focus
17-Slugger
18-Critical Boost
19-Partbreaker
20-Heroics
21-Capacity Boost
22-Artillery
23-Evade Window
24-Evade Extender
25-Guard Up
26-Attack Boost
27-Blast Attack
28-Critical Eye
29-Weakness Exploit
30-Handicraft
31-Agitator
32-Guard
33-Quick Sheath
34-Peak Performance
SO, when I was writing down my skills, I realized there's overlap with Blast Attack and whatever element/non-element I use. So, on a whim, I threw on an element that's completely not applicable for my weapon and I still got a CTD despite not actually being usable, which means one of two things: either I'm right about that technical overlap and there's a few configurations where you can get to 34 skills, or there's some mumbo-jumbo magic happening with my files that allows this. I guess the best way to test it is to replicate my set. Here's what I'm using:
-Zorah Headgear A
-Rathalos Mail B
-Nergigante Vambraces A
-Vaal Hazak Coil B
-Odogaron Greaves A
-Ironside Charm III (I made level 3 worth 7 points via the armor editor)
All other skills are via decorations.
If you can replicate this setup, I'm right. What that means, exactly? Not sure. Idk where else this can be applied, tbh, but at least it would solve this mystery. If not..... I'll send you my entire download? lol