Cloudfare-goflow

I Tried to decode the netflowv5,v9,ipfix and sflow using goflow.
I have cloned this https://github.com/cloudflare/goflow/tree/v3.4.5/cmd/goflow and compiled the project.

I am sending Netflow traffic of 1000 packets where each packet contains 10 flows.
Total flows = 1000*10 = 10000 flows.

Where I tried to decode the netflowV9,v5 and ipfix traffic result in 3000 flows using goflow. But acutual flows which i am sending is 10000.

I have also tried to send 50000 flows which result in 3000-5000 flows only. i need to know whether the max will be 3000-5000 flows only?