Research completion times aren't always correct either. I had one tech that showed 1 turn to complete and I had to press the turn button twice. No real biggie, but, I do adjust my domestic settings for optimal performance, not to waste anything if I can.
And I love large planets, great for industrial, merchant or research capitals. I get ones like that and can churn out medium ships in 1 turns or make them into research capitals and focus research for oodles of research points, same for marketing capticals and income. Give me three 15+ planets every game and watch me roar.