Extreme issues creating match schedule (for event with few teams)

**Describe the bug**
At several of our league meets we've run into extreme difficulties trying to set up match schedules, where setting up match block times behaves badly and is time-consuming/error prone. Spurious "breaks" get added, it's difficult to set match block times, and sometimes small changes to a match block cause radical changes to the full schedule.

**To Reproduce**
Steps to reproduce the behavior:

I found it difficult to write text with the steps to accurately document/reproduce/describe the behavior, so I created a
short (6-minute) YouTube video to illustrate the issues. https://youtu.be/I68LUmDR_NM My apologies if this is an inappropriate way to describe the problem.

**Expected behavior**
Setting values in match blocks should not cause radical/unexpected changes to the entire schedule.

**Screenshots**
Rather than screenshots it was easier to create a video: https://youtu.be/I68LUmDR_NM

**Device (please complete the following information):**
- OS: Windows 11
- Browser: Chrome
- Version: Chrome 130.0.6723.92