The filter order used while implementing the filter is very low for the very stringent frequency specifications. The filter is designed with a cutoff frequency of 0.47 and a sample rate of 1000 Hz.
Both the lowpass and bandpass designs are completely off because of the 10 order FIR filter as it is not large enough for the very small cutoff frequencies.
The correct way to solve this filtering problem is to resample the signal to a much lower sample rate and to design the filters with less stringent specifications. If this is not possible, then it will be helpful to use a much higher filter order or consider an IIR design
