Black - Red - Silver doesn't make sense at the start of the resistor code so it must be read the other way, (which happens to be top down, the preferred direction for vertical resistors). The fifth (or sixth) band is often confusing - extra bands after the tolerance tend to be proprietary, and may indicate temperature coefficient, reliability or identify a fusible or non-flammable resistor. You'd have to know what make they were to be certain.
From your description its unclear where the resistors where in the circuit. If they were a parallel pair in series with the + terminal of the bridge it would make more sense than what you described.