There seems to be some issue with the code Weaver Xtreme is generating for the logo (and some images, apparantly). These little errors are almost certainly not really affecting anything with your Google searches, but if you disable Scheme.org tag generation, the issues will not be there at all.
I do think that you should be seeing two different messages about the logo depending if you’ve defined a logo or not in the options.
I will try to look at this issue – it used to verify so the standard may have been changed a bit. Because of my travel schedule, I will be unable to provide any updates for a bit.