When using the Hedgerow brush, it allows me to select more than one line. However, it only draws the bushes on one line no matter how many I select. So I am having to do each line one by one. Is this working as intended, or is this a bug?
It is a limitation of the Symbols Along command. It is really only made for handling a single path at a time, but the single pick option doesn't play nice with macros, so the macro version need to use the regular selection option instead, which also has the side effect of letting people pick more than one path even if the command itself doesn't support it.