Night, blinking lights, traveling ~200MPH, about 10 - 20K feet, "Zig-zag-blink-flying"

I was floating in the resort pool at night, and saw flying in the sky:
(1) small craft, looks like a drone, blinking light, not flying very fast, heading toward the gulf. Suddenly, it disappears, then reappears about fifty feet to the side. This is what startled me. I would assume this was drone, but it just "zig-zagged", moving faster than light for a split second before reappearing, slightly skewed from its original trajectory. It did this a couple more times before it was out of sight.
About 10 minutes later I see (2) more of the SAME craft, flying next to each other. These DO NOT "zig zag fly" --- they fly in straight line, in a pair, toward the gulf. I start to believe these are just drones again, but then I remember how the other "zig-zagged" and I don't know what to think.
I wasn't going to report this, but about 2 weeks later, I am still bothered by it, and I feel compelled to report this for national safety.