Look for the fix, not everything
Judge the retest on the one thing you were working on. A single number wandering elsewhere is noise; the question is whether your priority moved in the right direction.
Give changes a couple of sessions to show up. One retest is a data point; a trend across a few is the real story.
Then decide
Improved and confident? Move to the next priority. Improved but unsure? Retest once more. No change? Adjust the drill or the cue before you abandon the fix.