It is perfectly clear that on October 28 at 20:00 the last payment of the POS.
I did not understand about the combination of blocks in 5 and 10k. More details please (possibly the complexity of translating Google)
You can send blocks to yourself with coin control feature set to enabled.
So small coin blocks can be combined to larger block that will POS more frequently.
Attached example of selected small blocks - just send it to yourself as one block:
http://www.imageup.ru/img69/2906658/capture.png.htmlJust keep time settings as auto sync