I am admittedly new to lead scoring. I inherited a relatively new Marketo instance (~1 year old) that is synced with a "seasoned" Salesforce instance with a lot of dirty data (I am sure you all can relate). I am doing some analysis of our lead scores, and I am not sure how this happened, but the demographic score + behavior score is not adding up to the lead score on a lot of our leads. I first noticed it because we had some leads with crazy low scores (think:-175) which is not possible with our lead score decay values. I reset all leads with no behavior scores to replace their lead score value with their demographic score value, which fixed a lot of them, but I am still finding some leads whose scores don't look out of the ordinary until you look at it next to the demographic and behavior scores.
I am assuming that there was some lead scoring in place in Salesforce a long time ago and that's where the dirty data is coming from. Any ideas on how I can fix this?