Hello Ero!
After looking throughout this issue and doing some more tests, I came to the conclusion that due to how RPG Maker games saves the data, the fix on the classes will only work in new files and cannot be override even if the source is corrected, so since you and others are enjoying the game so far, in order to not start from the beginning, I'm preparing a patch to fix the classes.
In the meanwhile if you wish, if you start a new game with the other character you'll see the classes will be as intended from the start.
Thank you very much for trying the gam and making me aware of these issues, working way too much and sleeping for few hours a day is taking a tool on my attention to these details!
I'm just excited of your game and i mean i will start from scratch if the game is done. I hope you release more so that i can test the new stage and make feedbacks of it using my saved data. If I caught problems, I'll just comment here asap so that you will be aware of the issue.
The game was so fun that if you release a new update, I download it instantly. I'll make sure to that your 2 months of progress will be worth it :D
Wow, I'm feeling flustered here!
I'm glad to see so much enthusiasm!
You bet I'll getting this game complete one way or another!
Also, as a special bonus, don't know if you noticed, there are special items in each stage that pretty much made the whole demo game easier, BUT are really helpful to fight the extra bosses AND the secret boss (which is hidden in the last room somewhere....)
Hope you have fun with that while I prepare the next release!