M2EUser2018

Hi Our Amazon Marketplace orders only seem to drop into M2E at a rate of circa 80 per hour (we also have, fewer, eBay orders dropping in). I'd like to know why I am seeing this limit: Is it an M2E setting? Is so, how could we increase? Is it related to settings on my server? Could it be an export limit from Amazon? Welcome any help and ideas. Thanks. KC