So is this how DTS works?

Have block of 20-26 for vacation. So you select DTS (option 2) and if you bid a line which has a sequence that is 17-20 on, 21-23 off and 24-27 on. It should drop both trips but you would only be paid for days 20, 24, 25 and 26. So 17-27 off? Is that the basic principal of it?

But let's throw vacation slide in there. They will slide 3 days forward or back so in this case likely forward, so now you vacation block is 17-23. And even with DTS selected, because the slide happens first they won't drop that second trip in this scenario? Is this correct? So it's probably best to only select DTS and not slide if you're attempting to maximize days off.