Welcome to the forum!
Sonars track meters don't define the recording level, the Scarlett does.
How are you setting the levels? You should set track meters to 0 dB and adjust the level in Scarletts input.
Is the "fat waveform" you see the preview, or do you see a fat waveform on the track also after the recording?
How is the track output set? All tracks should be routed to Master Bus, and Master Bus to Scarlett/Main Out.
What are you recording? Do you monitor with "Input echo" on?
"Tracks sound amazing when I put them on my Beats Studio monitor"...do you mean during recording??(Well, obviously, if the playback is low and fuzzy :o/)
Post #2: Are those levels during recording or during playback? (Ok, I see you are routing to Master).