Sorceress Lightning Mastery BUG!

Hello! There is a bug with lightning mastery maths. When I go from 1 to 2 in lightning mastery, my lightning damage drop down then up from 2 to 3. I also noticed that the same thing occur from 4 to 5 in lightning mastery where, again, the lighting damage drop down. To be clear, I do the exact same lightning damage with 3 points in mastery and with 5 point. Can this please be corrected. BTW It’s only one of the several bugs that make the game less enjoyable. One is causing difficulties to move close to some walls and anothers prevent light/fire casting to get to the target when an obstacle is close when the monster you are trying to hit with casting can bow you! There is also a problem with STAND STILL when mana go out, the sorc start to move toward the monster even I still press to stand still. Those are the worst anoying bugs for me atm. Thanks much for reading.