The cache IS at the posted coords. To qualify for this cache you must have found caches that fill in all the blocks in the D/T Grid. Use the Checker provided and post your results with your log.If the container is missing or the log is wet or full feel free to replace. Congrats to porknbeans for FTF. 
[Scouter James 1948](https://www.geocaching.com/profile/?u=Scouter%20James%201948) has used [Project-GC](https://project-gc.com/Challenges/GC83ATV/40334 "Project-GC Challenge Checker") to see if they qualified for this challenge and they did. I have found 81 out of 81.