Quote:
C, DOWN to low E, UP an octave to D, then DOWN to F !!!


On a fretted instrument these are your basic/simple choices due to the instrument itself.
Once you hit low E on a bass the only way to get to a D is to go up (almost) an octave .. I would 'expect' these intervals on a real bass.
If the bass is played on a keyboard it may be different, but played on an actual bass, it makes sense to me for RT's.

To over-ride the bass selection you can sometimes try something like using Cmaj7/E for chord entry (instead of Em) for the second chord, which may force the bass to go more where you were hoping, but in your example chord structure it sounds to me like a pretty expected result.
RT's only have so many options to choose from.
Unless you 'revoice' the chords .. and try to force something else




I do not work here, but the benefits are still awesome
Make your sound your own!