Well, most of the time its quite hard to deal with both the main and the co-supervisor
As you've said, conflicting ideas (and probably some money matters) can be really cumbersome for the student @____@

Still, I'm sure your main and co-supervisor are literate in specific aspects of your field right? So usually you'll have to consult both of them anyway. For instance, my main supervisor is good at molecular biology; whereas my co is good at conventional morphology and taxonomy. Most of the time their area of expertise won't overlap

Unfortunately its easier said than done

I really dislike supervisors/ co-supervisors who never contribute anything (apart from asking students to add more unnecessary work into their papers/ thesis); and I even hate those who take credit for themselves or belittle our efforts/work put into the paper/thesis... Its sad that unprofessional supervisors like this (quite a lot summore) exists among the scientific community

You are lecturer already bro? Or still student?
If I do that I'll probably just forget about graduating