Your system pad is not brand new, likely inherited from the previous owner. Whether you know your inlets or pressurized returns, chances are that some of your valves are broken, damaged or are hampering your weekly pool maintenance. Isolating drains from skimmers and returns from feature feeds can be an obstacle to priming, water feature balancing and closings without the quick ability to knock out water supply from individual water supplies:
 
Shut-off specific water inlets
Isolating skimmers from the priming source
Are your actuators managing the correct water flow between Pool & Spa modes?
 
Reach out if you want an honest appraisal of your legacy plumbing issues.