If there was a bug in sunrise/sunset in this version of Reactor, I suspect more people than just you would have raised the issue, in the more than 15 months since this version’s release. It’s always possible, but the complexity of this Reactor Sensor (18 conditions not shown in your post, and a large number of inter-connected activities) as shown by the Logic Summary makes me suspicious that you have a logic error. The contents of the Logic Summary posted, as I said, are pointing to Reactor having correct astro times and responding correctly for the time and conditions given.
As for the time stamps in your original post, the 19:05:58 is the time of day at the moment the condition was last evaluated. That can be any time, and with an RS as complex as what you have, any related/watched device changing state or any of the other 18 conditions triggering a re-evaluation will cause all of the conditions in the Reactor Sensor to be re-evaluated/examined, and all the present-time values on date/time conditions will move to reflect that moment. The “as of 07:07:43” is the moment the condition last changed state, and that could simply be caused by you editing the Reactor Sensor (which shows nearly 100 edits as of the Logic Summary sent), or resetting it or enabling/disabling it, any of which would cause the state to be erased and recomputed, so that time would merely be the time you last hit “save” or “reset” or “enable”. In order to get real time “as of” stamps, you would need to stop editing this Reactor Sensor and just let it run for full day, uninterrupted and without edits, resets, or enable/disable of the RS.
If you are convinced that civil dawn/dusk is not operating correctly, you’ll need to make a smaller test case to show the problem. Make a Reactor Sensor like this (and nothing else), and do not edit it for at least 24 hours. If something goes wrong, do not make any changes, just go to the Tools tab for the test RS and grab the Logic Summary and post it here.
Make sure it’s enabled. The initial state will be based on your current time (again as of when you hit the save button), so you will have to roll over midnight to really begin the real test. At midnight your local time, all conditions will go false. Based on current conditions for your location, the first condition should go true at about 4:47am your local time, the second one hour later, and both remain true all day. The third will go true at about 9:10pm your local time, and the fourth one hour later, and also remain true until midnight. All times are estimates for your location, but should be within a few minutes. At midnight, all conditions will again reset to false. This RS should be left undisturbed (no edits, resets, etc.) for at least a full cycle (midnight to midnight).