I think it is very challenging to try to line up two things like you are trying t o do.
Not saying it is impossible, but if these were my pieces, I would make rwo table runners - each with an unpieced backing that is larger than the top. In my experience - even with extremely close pin basting - the layers shift a bit.
For the runner made with fleece pieces - i am wondering if it would lay "flat"? If you overlapped the pieces- maybe - but with conventional seaming, I think it would be " lumpy and bumpy".
pressing so the tops are flat does make layering easier . But can one press fleece without ruining it?
The aqua piece is pretty.