I would say that you should ask the doctor what could be causing the increase in ferritin when the other labs are low. First, here’s information on ferritin from MedlinePlus:
Here’s a response to a similar question that I found on the National Anemia Action Council website along with 19 other questions for medical professionals:
Q3. How do you approach high ferritin, low iron saturation anemia (eg, as seen in renal failure and certain chronic diseases)?
A3. By NAAC Hematologist John W. Adamson, MD. Posted 8/22/03.
The issue here is whether or not the patient is iron deficient with an inflammatory process that raises the ferritin level and invalidates that measurement as a reflection of iron stores. The easiest way to address this is by giving iron and looking for an erythropoietic response (increase in hemoglobin or hematocrit) over time. In the old days, a bone marrow aspirate might have been done to look for stainable iron stores.
Source: http://www.anemia.org/professionals/asktheexpert/diagnosis.jsp