You sound like me! We had to make cookery aprons in needlework too, but every time I touched a sewing machine it stopped working so it took me forever to get mine done. I don't remember for sure, it was a long time ago, but it's possible mum had to finish mine at home just to get it done.
Two extra rib rows shouldn't make any difference at all. I often do extra rib on sleeves for myself anyway, and it doesn't affect the pattern, but then I have slightly longer than average and also very thin arms, and I like a good rib to keep my wrists snug. At least you realised in time to make both sleeves match!
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Two extra rib rows shouldn't make any difference at all. I often do extra rib on sleeves for myself anyway, and it doesn't affect the pattern, but then I have slightly longer than average and also very thin arms, and I like a good rib to keep my wrists snug. At least you realised in time to make both sleeves match!