Hikvision changed the Image Parameters Switch GUI and ISAPI functionality a bit in the latest firmware... you can no longer set time periods that "meet/overlap" unless they are on the hour or half hour... a bit hard to explain but if you have a camera and the image parameters switch now looks like this:
View attachment 209517
then you can try adjusting the times and you will see what happens. In any case, I've adjusted the utility so that rather than, for instance, setting a period to:
00:00:00 - 06:32:00 / 06:32:00 - 17:08:00 / 17:08:00 - 24:00:00
it instead sets it to:
00:00:00 - 06:31:00 / 06:32:00 - 17:07:00 / 17:08:00 - 24:00:00
and all is well. The new firmware also changes the "Normal" scene name to "Basic", but behind the scenes (ha-ha, pun unintended) the ISAPI traffic from/to the camera still use "Normal", so no change there... just know to choose "Normal" for "Basic".
Here is version 1.2: