As your images are already aligned you don’t really need Hugin to do the blending - something as simple as “enfuse --output=myoutput.jpg 2022*tif” from the command line will do what you’re looking for.
If you need a GUI, Hugin can work, but it gets confused sometimes (its default mode is to stitch panoramas, and the further out from this you get the higher chance of errors creeping in.)
For the set you uploaded, I would recommend selecting “Advanced” from the Interface menu; the project you uploaded here you’ll see that Hugin has assigned each image to a separate stack (a stack is a group of pictures that share the same point of view, and should be blended or fused together.) In this case it looks like the confusion was caused by cloud and water movement.
Since these photos are all aligned (your tripod looks sturdy enough) best course of action would be to set all the images to the same stack, reset your positions, delete all your control points and camera and output data and then stitch.
From the “Photos” tab, select all the photos, right-click and select “Stacks - > Change Stack” and enter “0”, which will tell Hugin that they are all part of the same picture.
Right-click again (making sure all photos are still selected) and select “Control Points → Remove Control Points”.
Right-click again and go to “Reset”, and use each of the options there.
(Alternately, start over with a new project, just load them into the “Advanced” view and make sure they all get the same stack number.)
Once you have that done (either starting over or resetting everything), in the Geometric Optimizer make sure “Positions (incremental, starting from anchor)” is selected, and hit “Calculate”
Go to the “Stitcher” tab, set projection to “rectilinear”, then click once on “Calculate Field of View”, then “Calculate Optimal Size”, and “Fit Crop to Images”. Then click “Stitch!” in bottom right corner.
If you want to check the output before stitching, you can open the “GL” preview.
