unnecessary stream crossing layout causes confusion

This is with a vintage 21Mar console. Layouts of more complex apps, such as the sensorAnalytics sample app, result in flow graphs where streams unnecessarily cross and some oplets for one stream are rendered overlayed on another stream making it look like the oplet is associated with some other stream (e.g., oplet 11 in the screenshots below)

See the two attachments. One shows the default / initial rendering. The other shows a "manually adjusted" one (following a pause and dragging oplets).