Looks like it is working fine … If I reveal the bio I see the the photo is being displayed:
If the photo displays, so should the logo. It all uses the same code.
If you uploaded a logo, what is the file type and size? Did you set the logo display? It is possible to upload a logo and set it to be not displayed. Edit the entry, there will be options under the logo for display, not displayed and remove. make sure display is set.