Experimenting with GPU-tasks I disabled CPU-use a) within the settings of several projects (Amicable numbers, Collatz, Asteroids etc) and b) using the BAM-settings for some hosts (no CPU, use GPUs), too. Repeatedly the settings "do not use CPU" at the projects were overwritten and set to "use CPU". The host-settings within BAM "do not use CPU" were ignored by the BOINC-Client, too. So finally the pc were crunching unwanted CPU-jobs. Is there any setup or procedure to avoid this malfunction?