I've got a new to me gen 1 20/20 monitor with airforce.  It is showing constant multiples on one row, when I watch the singulation screen it is one mutliple after another, every seed is showing up as a multiple.  All other rows seem to be showing like they should.  I thought maybe the seed tube sensor was bad so I tried a new one with no change (it has the original JD high rate sensors, not the wave vision)  Any ideas on where I should start to figure out why it's doing this.  This row that is in question does have a rum and weigh pin as well, not sure if that could be a contributing factor if either one of those was malfunctioning?

Thanks