To add to the great advice from
@EllieM I would check the meals that should only have 1 unit of bolus.
Are these very low carb meals? If so, you may need to bolus for protein.
Personally, I find low carb meals very difficult to bolus for due to the protein factor
If we eat no carbs, our bodies breakdown protein for glucose. Unfortunately, the insulin to protein ratio varies a lot depending what the protein is. Nuts have a different ratio to eggs which have a different ratio to salmon which has a different ratio to prawns and I don't eat meat so never needed to work out the different ratios for beef, pork, ham, salami, pepperoni, sausages, lamb, etc.
I quickly gave up with low carb because it made my Type 1 diabetes harder to manage.