Yes, it makes perfect sense. I have no idea why they don't seem to be working.
I suppose it is possible that the forwards are broken; it is also possible that the ceivamobile.com server is rejecting them.
Have you tried to set up a forward to a different host as a test? That might tell you if all the forwards are broken or if the problem is with the receiving server is rejecting them (or treating them as spam since they are "forwards" and from a shared mail server).