I have a small problem with my the Insom 3/4 hotbar, but it seems it appear also on the normal hotbar:
I have set the custom hotbar to have 3 shortcuted one (Number,Alt,Ctrl) and 2 non shortcuted one, like
this
The problem is whenever I log out and log back, the 2 non shortcuted ones are automatically set to have additionnal shortcut
like this
Also, I noticed that the UI seems to have some preferences about the line of skill you choose. For exemple in the last 2 non shorcuted hotbar would always choose the 1st sets of skills (shortcut Number and Ctrl in my 1st image) after log, and I always had to cycle to the appropriate line of skill. I corrected that in setting the skills in another line.