Misunderstanding Trope is if the alpha seme was actually in love with the uke and he just had trouble expressing himself, and the uke misunderstood. But the alpha ACTUALLY did not like the uke back for years, and he BARELY started to realize he finds the uke cute before the pregnancy, which is why he tries to find a different sex partner after they broke the contract. The uke did not "misunderstand", he just took the alpha seme's actions as is. This counts as a "Late Realization of Feelings" trope, not a Misunderstanding Trope.
Misunderstanding Trope is if the alpha seme was actually in love with the uke and he just had trouble expressing himself, and the uke misunderstood. But the alpha ACTUALLY did not like the uke back for years, and he BARELY started to realize he finds the uke cute before the pregnancy, which is why he tries to find a different sex partner after they broke the contract. The uke did not "misunderstand", he just took the alpha seme's actions as is. This counts as a "Late Realization of Feelings" trope, not a Misunderstanding Trope.