Vintage Synth Repair

Hello all... I don't know whether the last message I sent made it through or not... Anyhow. I am working on an ARP Solus that had a dead VCO1. I replaced the tempco resistors, (r60 and r98) and it fires up and sounds great. Now the issue I am having is that VCO1 tracks in reverse, and badly at that. VCO2 is tracking perfectly. The service manual and schematics available are pretty poor in quality and somewhat topical in nature. Anyone have any suggestions about where to look? Thanks much!