What am I missing here?
Short answer: The newest AHP version
Since the times for daylight savings time starting and stopping have changed AHP has had issues with this.
I don't even believe version 3.318 completely cured the issue.
However some have reported the conversion tool I created to bring a European version to 3.318 fixed the issue.
If this is the case updating to 3.318 should solve your issue, the problem is the x10 servers are down which hold the installers and registrations.
I expect to have a new 3.318 full installer ready shortly.