Troubleshooting in a apartment is tough because you sometime share coax with other apartments. If you are getting 32Mbps, sounds like the gateway is going into partial service mode. That's when it can't lock onto some of the channels used for service. Think of it like a highway with multiple lanes. The more lanes, the more cars that can use it before there is traffic. Each lane/channel is like a station on a radio dial. It uses it's own frequency and if there is noise on those frequencies, the gateway can't connect to them. I would start by posting the signal levels. That will tell you the type of problem you are having. Then try to figure out where all the coax come together for your apartment complex. Does each apartment get their own line to the street? If not, where does the line split to the different apartments?