IMHO YOu forgot to exclude those shares already dedicated to existing debt/warrants/options etc.
If you want a history lesson here is what happened in 2016 and let me remind you DP just got back in bed with Dominion again. IMHO
"Issuances of Warrants:
On August 12, 2016, the Company issued warrants in favor of Dominion to acquire up to 500,000 shares common stock at $0.44 per share. The warrants have a four-year term. Dominion has the right to cashless exercise of the warrants if at the time of exercise there is no effective registration statement for the underlying common stock. The warrants were issued as consideration for the Company's default of a $500,000 note dated December 14, 2015. The default was as a result of the Company not having sufficient shares of common stock to issue to Dominion upon its conversion of the note."