Pedal line for multiple bars

I have this Einaudi piece (Una Mattina) with a melody line walking all over the bass and treble bars (attached). For the first twelve full measures, it needs a pedal (sustain) line below the bottom bar for each pair of measures. The line should run from the first 16th note of the first measure to the ninth 16th note in the second measure (and that six times).

However, the way the piece is set up, with broken chords running from the bass to the treble bar, most of the notes are connected to the treble bar in MuseScore (in the first section, only the pickup note is actually connected to the bottom bar.

If I add a pedal line to the notes in the treble bar, it ends up between the bars, and gets oblitarated by the beams connecting the 16ths in the bass and treble bars (the beams in this piece are between the two bars). And it doesn't seem I can lower the pedal line to end up below the bass bar; MuseScore just increases the whitespace between the bars.

I've worked around the issue by adding a pedal line to the first of of the two bass measures, and editing the pedal line to extend as far as the ninth 16th in the second measure. That looks good, and prints right.

But now when I play the piece in MuseScore, the sustain effect is only heard in the first measure, and the second measure is played without sustain.

So... is it possible to add a pedal line to a score so that:

A. it begins and ends on notes in different bars (in terms of its effect on sustain);
B. it displays and prints below the bass bar?