It can't have escaped notice that the 'Infrastructure Solutions' forum seems to be the "dumping ground" for loads of first posts which should be in other forums.
The reason has now been explained by Pisc86:
"I don't choose the correct forum because I click on '+ New' without seeing below the forum selected by default.
It would be very useful to give the possibility to choose the forum after clicking '+ New' button."
In the main Forums page:
pressing that '+New' button does, indeed, create a post in the 'Infrastructure Solutions' forum - without prompting, or offering any choice:
View all questions in Community Help forum