I assume you've probably found a solution to both of these problems by now. I've only just signed up myself but can probably help a little.
The manage and track options are grey when you're not signed in. Check your signed in and if it continues to occur try clearing your browser history and cookies. If it is still a problem try a different browser.
The heart hate is definately too high at rest. Wipe and clean the connectors and the strap with a damp cloth, and try taking your heart rate at rest when you wake up in the morning. Depending on your sex, age and level of fitness it will vary. Mine is 70 BPM. If you're talking your heart rate whilst walking then 124 BPM is not bad.
