The water was too hot when it touched the grounds. Let it cool 30 seconds after boiling before pouring over coffee. The coffee steeped too long. Decrease steeping time. The coffee has a lot of sediment.
Some sediment is normal.
If it is excessive or your filter screen gets clogged then set your grinder setting more coarse. If I had me a grinder Grinding your coffee just before brewing is a huge step toward improving the flavor in your cup. Ground coffee stales 7 times faster than whole bean coffee. I tell people that a bag of ground coffee is noticeably staling after 3-4 days, and that is if you're keeping it in an airtight container. Adding a burr grinder to your coffee gear is the optimal way to experience the consistent freshness of our Total Quality coffees.