Yes. For Real. Your authorities when you use this forum are completely independent of the amount of time you’ve used SketchUp.
The details are:
And at the time you made the first post, you were at the “New User” level.
To remove the restriction, you only need to do all of the following simple tasks on the forum:
- enter at least 3 topics
- read at least 15 posts
- spend a total of 6 minutes reading posts
By the stats on your profile, it appears that, subsequent to the post where you were limited to one image, you’ve already done all of these. So you should no longer be restricted to 1 image/post.