Please start a new thread for every bug you report, this makes the bugs easier to discuss than having one huge thread with all reports in it. Make sure that the thread is not in the main list or being discussed in another thread already. Give as many details as possible when describing the bug.
Add tags with the CoH version you're referring to to your thread title, like "[1.13] Machine Gun Squads can't exit buildings". If the bug is also present in future versions, edit your thread title with the updated version tag and bump it.
Add screenshots and a replay to your post if you got one, that helps a lot in seeing the issue. If you can reproduce the bug, add a description how to do it.