There are no "rules" for reporting bugs, but this is the only place to get them looked into.
I would recommend a couple of points to make it easier on all of us, both those of us testing and the SD people who have to fix them.
1). Report unconnected bugs in separate threads. Although it is not required, I have a sense that it:
a). makes it easier for SD to address them

. avoids confusion among all of us
c). makes it easier for us to find out if a bug has already been reported.
2). Try to make the title of a bug report thread be as descriptive as possilbe (within the constraints of the forum's limitation of title character length). As you can imagine, a tread titled "bug report" makes it mandatory that anyone planning to report a bug look through all of the detail of all of such threads if he/she wants to avoid the embarrassment of duplicate reporting of bugs. I tend to forget what has been reported in titles with such uninformative titles, and have gotten to the point of not rechecking them for a bug I have discovered (it really takes WAY too much time to re-read all of those threads).