What Does The Following MRI Scan Report Indicate?

There was an MRI done at the end of January and another done in summer of 2012. The results are as follows and I am very confused as to how things can just fix themselves as they supposedly have and also why if there are less issues there is more radiculopathy and parasthesia? 2012: straightening of normal lumbar lordosis; mild disc space loss L4-L5 & L5-S1; loss of disc signal at L5-S1; nonspecific hyperintensities in subq fat overlying the distal sacrum on the sagittal but not the axial images; L4-L5 left parasagittal disc herniation with moderate narrowing of the left neural foramina and broad-based disc bulge with narrowing of the right neural foramina; some mild verticle linear hyperintensity within the disc; facet hypertrophy and mild spinal canal stenosis; L5-S1 broad-based disc bulge with right paracentral disc herniation with moderate to severe narrowing of the right neural formina and canal stenosis. MRI from January of 2015 : normal lordotic curvature; no abnormal marrow replacing signal in visualized osseous elements or edema and STIR acquisition. Conus is normal in position & signal; L4-L5 disc demonstrates small residual tear to the left midline without gross herniation into material and significantly decreased from prior study; L5-S1 disc demonstrates narrowing & diminution normal signal right sided paracentral herniation prior study has decreased significantly with mild residual broad-based bulging persisting; intervertabral foramen demonstrate mild narrowing at L5-S1