Issue with Incorrect Percentile Calculation in JMeter HTML Report

### Expected behavior

I expect the calculations on the Transaction controller to respect the values described by the columns

### Actual behavior

Hi everyone,

I'm encountering an issue with the results in the HTML report. For testing purposes, I’ve set up a Thread Group with a Transaction Controller, and under it, two HTTP Request samplers. I’ve checked the "Generate Parent Sample" option, as commonly recommended. However, when generating the HTML report, I notice that the statistics for the Transaction Controller show incorrect data: for instance, the percentile value is calculated as a sum rather than the expected value for that column. Does anyone know what could be causing this?

### Steps to reproduce the problem

1. Configure a Thread Group in JMeter.

2. Add a Transaction Controller within the Thread Group.

3. Insert two HTTP Request samplers under the Transaction Controller.

4. Enable the "Generate Parent Sample" option as recommended.

5. Generate the HTML report.

6. Observe incorrect data in the report, particularly the percentile calculated as a sum instead of the correct value.

### JMeter Version

5.6.3

### Java Version

11

### OS Version

Linux