a mysterious error adding time in Subtitle Edit

[loninappleton]

This could well have been an error I made accidentally with the wave form.
But the mysterious error is that as I go through dialog and make fine corrections, about 13 seconds is added to the
previous line which I then have to manually adjust downward on the timings. So the error has to be corrected in that step.
Is this automatic addition shown in a settings someplace? I cannot find it, so progress is slow at having to make a manual
correction each time. I have not seen it previously so it must be unique to this file and reloads along with it.

[loninappleton]

One thing I am going to try is resetting to default all SE settings at the settings tab. Perhaps that will solve the timing issues.
Even if I did a scratch install of the new version, it's possible something is saved in Profile. Anyway not solved yet.