Roll-over

I rolled over my soybean-meal spread trade from July to Aug. I guess I should have rolled over to Nov where there are tons of volume. I suppose a beginner's mistake.

Covered: 2 July Soybeans at avg of 1582.575
Bought back: 2 July Soymeals at 423.40

Short 2 Aug Soybeans at 1580
Long 2 Aug Soymeals at 421.2

I've been holding this position for 6 months now. I almost forgot to roll-over which would have resulted in a stack of soybeans in front of my house.