Wavelab 8.5.20 - 2 monitors

The problem below still has not been addressed by Steinberg - any others out there had a similar issue with Wavelab 8.5?

Plugins span both of my monitors, but do not ‘stick’ on the second monitor - I drag them to the second monitor (monitors are stacked vertically), but they slide right back to the first monitor. I have disabled the spanning monitor in Mission Control. Any suggestions would be welcome. Wavelab metering is fine though (stays on the second monitor).

Moc OSX 10.9