How in the world do I make these lostcities spawn less? I hate having so many in the entire world I just want to see them sometimes.

Use the rarecities profile

What do I change? I see a bunch of low values that look nothing like what I see in game, in game it looks like cities are at 100% for spawn chance or generate chance.

SOLVED: How to do it for servers is, edit the leveltype and generator settings.
Step 1. Go into serverproperties
Step 2. level-type=lostcities
Step 3. generator-settings={"profile":"rarecities"}
Step 4. Edit rarecities.cfg in config-lostcities-rarecities
Final step. Change CityChance to anything under or below 5 zeros, if you want plots of cities at least 5 zeros so like 0.000002. More zeros means less chance.

if i already have a world can i add it in for future chunks loaded?

No, you can't make changes like that