@GleamB: for your image, if your image is hosted on some other site, copy the
link to the imags, then press the little "Img" button on top of the post-a-reply editor and then paste the link between the two "img" tags in square brackets. That usually works without any size restrictions.
Unlike many other sites with more modern software, our forum cannot resize images on upload. There's a "How to use this forum" section which has details on posting images and how to resize them, if you have something that you might like to permanently upload here. Generally, we prefer that approach, but primarily for images that will have some lasting value. For a quick, "can you help me with this" picture, externally stored images are fine.
Now, to your CB issue.
I think the best would be for you to put your boat on its side and manually pull out the the CB and then see what is up with those lines. In your earlier post you write the "neither line moves the CB" - I assume that means when it's in the water, because on the trailer, the CB should be supported from below and not able to move.
You write that you read older posts: the most common thing is that the lines get fouled and get wedged between CB and trunk. The way people deal with that is to tension the lines with some shock cord. The blocks on the cuddy floor (near the mast) serve to increase the mechanical advantage for the uphaul. That one is in the direction where it has to work against gravity. The downhaul does not, and I have sailed on a DSII that did not have any blocks (pulleys) underneath the cuddy deck.
For the uphaul, this image shows (almost) everything:
The bit that is the "metal cable" is replaced by the "white line" in your setup. The ugly three-strand is a line you would have to supply that is then lead to the cockpit and cleated off somewhere. The system, as shown, is a 4:1. (If you feel that is overkill, you could leave out two blocks and turn it into a 2:1).
There's no need for any of the lines to be metal cable. You may in fact be able to use the lines that exist (after you cleared them where they are most likely wedged between CB and trunk). If only one of these got wedged, you know which one you should rig with some shock cord so it is always under tension. (In the photo, if you wanted to keep the uphaul tensioned, you'd lead some shock cord to the unused eye strap.)
Please let us know how whether this allows you to make progress and also whether you were able to fix your spreader issue.