GET api/issues/search is returning all Code Smells ever raised on the project (whether they are now fixed, marked as false-positive, etc.) You can check the Web API documentation for how to further narrow this result set if needed.
GET api/measures/component is returning the existing number of open code smells.
The data is actually being returned in minutes (130 minutes = 2 hours)
This should be fixed in the GET api/metrics/search response as of SonarQube v7.7 (SONAR-11802) and will be fixed in the Metrics Definitions documentation soon (SONAR-13137)