Cargo volumes increased last month at the Port of Los Angeles, although the neighboring Port of Long Beach saw a decline in activity after what officials there characterized as mismatch between last year’s peak shipping season and this year’s.

In all, 758,000 shipping containers moved through the Port of Los Angeles in August, a 7 percent increase over the same month last year. Imports were up 8 percent while exports rose 6 percent. Through the first eight months of the year, cargo volumes in Los Angeles have risen nearly 8 percent to more than 5.5 million containers moving in and out of the port.

Port of Long Beach officials, however, reported on Monday that total shipping activity in August decreased 9 percent year-over-year to roughly 573,000 containers. Imports to Long Beach were down 8 percent, while exports fell by nearly 18 percent.

Officials there said some shippers moved goods through the port earlier than they did last year to avoid possible delays related to ongoing port labor negotiations, resulting in a slower August.

The contract between West Coast port operators and the International Longshore and Warehouse Union expired on July 1 and labor talks between the two sides are ongoing. Negotiators reached a preliminary deal on health benefits in late August.

Through August, shipping activity at Port of Long Beach is up 1 percent to more than 4.5 million containers.