Why does my shape library have 3 and 4 what appear to be duplicates?! I just deleted the files in my user/prefs/wtools/presets. Added new ones and they're duplicated again.

Hi,
First, make sure you have the correct preset path in LWCAD Options panel.
Another possible problem is naming. You must always add a unique name.

Actual library system is very outdated, and will be replaced by a new system within a year or two.

Solved. There were multiple libraries in different places on my system. LWcad was reading all of them.