There is not really much you can do about it.
There are 3 sections to the line type list - solid, dashed and symbol.
Each section lists based on the attribute number of those line types.
You can use the attribute manager to re-number the line types but you will affect how existing lines in your plan are displayed (you will be swapping one line for another when you change the attribute numbers) and you will also have trouble copying and pasting from one file to another if the lines have different attribute numbers.
See this post for a bit more of an explanation.
http://archicad-talk.graphisoft.com/viewtopic.php?p=176405
[edit] link added.
Barry.
One of the forum moderators.
Versions 6.5 to 27
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