Yes, it is not rare that old questions that become obsolete are being deleted, to prevent confusion.
For example, What is the meaning of CHAOS? Is it related to the PSI (Ψ) character? was posted by Joel Spolsky and deleted after about a year, when the CHAOS project has ended and the question served no purpose anymore. All that while it got almost 100 upvotes.
Another option is questions that got migrated over to MSO at some point, which is equivalent for deleting, as we won't see them on the user's profile. For example Open Source Advertising - Sidebar - 1H 2014 was migrated to MSO.
So Shog got questions that were well received then at some point deleted or migrated, hence not visible in his profile. No bug, and nothing really odd here.