Understanding output of results

I am trying to understand the in-tool reporting of test results that I am seeing.

I executed a test with Max Target Runs set to 200,000. The test ran for 5:04 minutes and the Test Step Metrics have the following:

Data Source count:  194774

REST Request count: 194846

Test Case Level count:  200099

The REST request writes a record to a database table and in the table I have 199995 records. 

I am not sure how to interpret this. They are all different counts and I don't know why.  Can anyone help me understand this output better?

I expected the test to execute 200,000 request so why then am I seeing less but the test case level is higher?