That blue circle with a question mark indicates that the fulfilment status is unknown, therefore caches with that icon will not be excluded by either Fulfilled or Unfulfilled filters (neither will challenges without checkers). This fulfilment is according to the checker, so these caches don't appear to have had the checker run for your account. You can go into the individual checkers and run them (using the links available on the challenge map) or, if you're a paying member of PGC, they will run automatically at some stage in the future.
Fulfilled challenges are shown with and unfulfilled ones with .