(Not tax advice, personal opinion only, not representative of Bright Trading or any of it's affiliates).
The $1250 draw "should not" be the determining factor in your
K-1 earnings. For example, our traders get a K-1 based on their actual "mark to market" earnings....say they make $100K, and draw zero (as many do)... they still get a K-1 for the $100K. Now if they made zero, and drew out cash, then no taxable event. If your firm is giving you a "draw against potential future earnings" then be really (really) careful in how you handle it... it'f probably ok, but can be a gigantic red flag to the IRS.
As far as Self Employment tax exemption, that depends on whether your LLC chose the that exemption (as we did).
FWIW,
Don