The reason for this is that the input represents an ambiguous definition.
In the line with ‘LANE’, all tracks are initially defined over the entire length.
In the following line, in which only the inputs SA and SE are used, a lane is then defined again, but now only from 5-18 metres.
Solution: Define everything in one line or add a double-$ at the end of the first line.
Either
lane 'AXIS”'type ec wl -4 wr 5 yla -5 yra 5 sa #start+0.0 se #start+13
or
lane 'AXIS”'type ec wl -4 wr 5 yla -5 yra 5 $$
sa #start+0.0 se #start+1