Endnote keeps repeating my previous citation when i add a different new citation.

Hi there. 

I am new to Endnote. I was using endnote without problems when i was adding citations for in-text referencing. I then proceeded to add a citation form author A. Max (example) which i downloaded from google to endnote and then inserted it from endnote to Word document. However since then, when i proceed to the next line of my text and want to add a new citation from a different author, i select insert citation and it takes me to the endnote program, i search a different author and select insert. However it does not insert the new citation, it keeps repeating the same one from A. Max no matter which different citation i select from EndNote. Now i am completely stuck and cant continue my referencing as it keeps adding the wrong / same citation. Can anyone help me fix this? I have  already tried restarting both Endnote and Word programs and updated the citations and bibliography in word.

Kind regards, Chantelle