Cauda equina syndrome can result from trauma or injury to the spinal column resulting in compression of the nerve roots from L1-5 and S1-5. Compression and trauma from an injury like you are describing, especially untreated, can certainly cause incomplete cauda equina syndrome.
Prognosis for recovery is related to how severe the initial compression of the nerves was, and the severity of the initial injury and how long it lasted (the duration)
If the damage is so severe that nerve regrowth is not possible, the damage may be permanent. It may not be possible for some time to know whether or not damage is permanent. Early surgery as a treatment for this type of injury offers the best prognosis.
It appears that your initial injury lead to the development of cauda equina syndrome. Surgery may have helped to prevent it, but may not have lead to a better outcome at all. The deterioration is due to continued compression of the nerves and lack of their ability to regenerate.
Please note that I am a medical specialist and not a neurologist. Please reply to me with questions.
It will benefit you to have a consultation with a specialist in workers compensation cases, since you have alot at stake, I would encourage you to do this.
Since you were at home, a case can be made that the deterioration was not related to the initial injury since its very hard to prove it. If you have been in active treatment and have xrays or records of physical therapy and deterioration has occurred DESPITE treatment, then you have a stronger case. If there has been no treatment, the case is weaker.
Its a good idea to take all your medical records for review by a workers compensation Dr and get some advice based on that.