Thanks for your both late, and speedy reply. I figured I’d check back before I went to sleep, I didn’t think anyone would post so late. I was able to locate the appropriate .css files, for future reference (so no one else is confused), they are located in pluginsbp-template-pack right under my nose. I feel like a bit of an idiot now, however I managed to edit several margins that had been set to negative numbers, such as negative nineteen, which my style does not support it would seem.
As for the Avatar cropping, I have had no luck with this. I scanned the page you linked me, changed my theme, and even disabled it entirely just to rule out that possibility all together to no avail. I did notice however, that this error message is now popping up: There was a problem cropping the avatar, please try uploading it again.
When I attempt to crop any avatar’s for both groups and persons joining, the crop window does not appear over the picture. I can still select crop picture, only nothing happens. It grabs the corner of said image, and chooses that.