Stepping Thread Group vs Number of Samples JMeter

I want to understand the relation between Stepping up Thread Groups and Number of Samples.

Stepping Thread Group

My Test Plan looks like this:

Test Plan

But in the Summary report I am getting #Samples more than 10 for certain Requests. Not able to understand how is it working.

The actual number of Sample Results will not necessarily be 10 as:

1. JMeter starts 1 thread each 2 second until the number of threads will be 10
2. Once started thread starts executing Samplers upside down
3. When thread finishes executing Samplers and 60 seconds of duration has not yet passed the threads starts over

So the actual number of Samplers which will be executed in 60 seconds by 10 threads will depend mostly on your application response time.

Check out What is the Relationship Between Users and Hits Per Second? article to learn more about correlation of number of virtual users and delivered load