Hi,
Thank you for asking.
To give you some peace of mind, it is more common in Swedish than in English that we conjugate nouns and verbs differently. So, we may have two ways of conjugation and it can be totally normal here. It depends on two facts: Sweden has a lot of dialects and Swedish changes over time.
I refer to Lexin because it is not a random dictionary on the Internet. This online dictionary was created by two important organizations: Institutet för språk och folkminnen (Institution of language and public memory), och Kungliga Tekniska högskolan (one of the top Swedish universities). Usually, Lexin shows the most common conjugation.
You may also check SAOL (Svenska Akademiens ordlista, Word List of the Swedish Academy). It's also a good resource and it also shows conjugation.
Easier and closer to practice are Lexin and SAOL. I highly recommend sticking to them in order to avoid being confused even more.
Anastasia