Cubase Pro 8 skipping legato notes

I’ve drawn in a row of 16th notes on a Retrologue instrument track, and it’s playing back 8ths. The only way I can get all the notes to sound is to select them and shorten them slightly. I’ve never, ever had to do this in Cubase 7.5. Any idea what could be causing this? Latest version of Cubase on Windows 8.1, Komplete Audio 6 interface. Cheers!