well, you have to think of the body more like a collection of systems. when each system is working well, there arent any problems [obviously]. when one system isnt working well, however, other systems have to overcompensate and are affected, and, thus, more seemingly unrelated symptoms occur.
the reason for ear symptoms relates to the anatomy of the TMJs and ears: they are incredibly close to one another. there are muscles that are attached to the ear drum and the eustachian tube. when your jaw muscles are tense so are the ear muscle: there is a single nerve for both the chewing and ear muscles.
the chewing muscles are often very tender with TMJD patients: pterygoids, masseter, sternocleidomastoid, temporalis, etc. anyway, if your TM disc is not functioning properly and gets displaced [stuck], it can affect your muscles. let's say if your main problem is with the right TMJ. well, your left TMJ and muscles may try to overcompensate. more symptoms.
a lot of the pain that you described in your cheeks and chin [and headaches] might be muscular related. of course, there are many things that could cause those symptoms: have you had any diagnostic testing done? having tomograms [xrays], muscle palpation, MRI, etc will determine if your problem is structural or muscular or a combination of the both.
anyway, i hope that wasn't confusing.