My colleague presented two separate posters, one at a domestic conference and another at an international conference, based on the work both of us have been collaborating for past 1.5 years.

Before submitting the abstract or the poster, they did not seek my approval. In fact, I was not aware of this until recently. 

In the poster, they put themselves first in the author list and me as second. Apart from the fact that poster submission was not disclosed, the authorship order was not explicitly discussed.

In the poster, they included an elaborate set of their contact information, even (non-traditional in academic publishing) details such as tweet handle and other auxiliary information, when clearly there was space to include the rest of the authors information.

I am offended by this. I am not sure what the universally accepted academic code of conduct in such instances is?