Welcome to Knitting Help!
GG, thanks very much for the link to the photo.
How many rows off are you at the join? Could you adjust the number of rows on the left leg pattern (add or subtract 1 or 2 rows) so that the patterns will meet up correctly? Perhaps you could adjust both legs to make the pattern match up. I don’t think the difference in number of rows would be very noticeable, especially on a baby. Adorable pattern!