We discovered a bug with the latest version (1.0.22) when using the "One wav per element" option. If it sounds like your case then it will be fixed very soon.
If not, would you be able to send the recording to me (at
richard.lee@aerodrums.com) or any other recording that exhibits the same problem so I can investigate the issue.
On Windows, you can find the recordings in the "recordings" subfolder of your Aerodrums installation folder. On Mac the recordings folder will inside the Aerodrums.app bundle.
Thanks.