Here's a couple of questions to help narrow down what this issue might be:
Could you post your code so we can have a look at it? What service are you connecting to? What is your input data? Are you getting any error messages or warnings on solve? Is there throttling on the service that limits the number of facilities?
Any additional information would help us work this out. There is nothing inherent to the CF solver that would limit it to 10 facilities.