1. Make sure bars are not locked.
2. Make sure that in user settings>options you have disable clicking on self turn OFF(I can't remember the exact name of the option, but its there)
3. How are you going about trying to make new hot bars? In pincos you should just be able to right click a hot key slot & select add new hotbar... then input width x height. e.g. 6x1 will give a 6 block wide hot bar that is one high. 6x2 will give 6 bars wide 2 high. 2x6 will make a vertical bar that is 2 wide 6 high.
Let me know if you still have issues after this. I normally have it disabled to click on myself so I cannot accidentally dismount in combat. I just right click the health bar for context menu or dclick to dismount.