I think the coding is a little messy. Try this:
EXT.FRONT NEW HOUSE with WHITE VAN to 0.532 -176 -91 in zone 1 at layer 2
&LUMI spot 0.466 -498 140 in zone 1 at layer 0 AND LUMI faces right
&CLARA spot 0.454 -445 147 in zone 1 at layer 1 AND CLARA faces right
&LUMI walks to spot 0.466 142 140 in zone 1 in 5 AND LUMI does it while idle AND CLARA walks to spot 0.454 195 147 in zone 1 in 5 AND CLARA does it while idle
@overlay WHITE VAN shifts to 0 0 in 5 <------------------------ (If i got it right?)