Is it reporting that member profiles are blocked then? Are there other URLs besides these that it reports as blocked? I ask because in your screenshot it shows 3144 problems, yet you only have 1580 members.
Have you edited the robots.text file recently? Is Google still reporting these URLs as blocked, or only back in September?
I would note that this is not related to when Google last read the sitemap; that will be listed elsewhere. It's related to specific errors it found on the sitemap at some point in time. It's possible those errors have since been rectified, but it certainly seems to show them for historical purposes.