I'm sorry, but I couldn't catch exactly in which situation the problem is occurring, but if you have two images with different frames, you won't get the results you want.
If you want to merge two images into one, you can get the result from the Insert tab of Honeycam.
First, open the background image into Honeycam and press the [挿入] button to switch to the Insert tab. Then drag and drop a transparent image on the Insert tab, the transparent image is composited on the background image. When you have aligned the positions, press the OK button to combine the two images to form one image.
Of course, you can do the same on animation images as well.
I hope this will help you to compose two images.