Possible bug. Question for a work around if available.

Prime Grid and E@H give me a bit of trouble because on the respective web sites I have "don't use Nvidia GPU" but I use the GPUs on other projects (mostly GPUgrid). Sometimes after client has talked with BAM the project site will have "use Nvidia GPU" turned back on... it's not a huge deal as I can turn it back off and abort the WUs downloaded for, let's say E@H or Prime... I'm fairly sure this is because in the "Global" prefs on BAM I have "use GPU" set on. So this "feature" causes me to download GPU WUs for projects I'd just as soon not so I have a couple questions:

Q: If I were to set work prefs (global) in BAM to not use the GPU would I have the reverse problem with GPUGrid? That is would it turn using GPU off on that project after talking to BAM (maybe not since it's GPU only).

Q: What about a project like Collatz that has GPU & CPU but I only do GPU on that project (with just one machine actually).

Any insight appreciated. Thanx, Skip