Is something missing from the requirements for Antimatter Missile? I don't have it as a research option and I've certainly researched Harvester.
Also you can remove the ? from Starchaser. The UFOpedia entry for Stingray states 'no requirements' but I think it does actually require Starchaser to be researched first. (UFOpedia bug).
I think it would be good to get a confirmation that you can research Dragon Interceptor without researching Alien Astrogation or Alien Detection first.