The decorative elements are rasters, not filled vectors. Each raster is treated as its own thing in the gf ui. Your text is a filled vector and because it is the same color, is treated as one thing by the gf ui.
If you want your rasters to be a single operation in the gf ui, you’ll need to save them as a single object. There are several ways to do this. What I did was select each raster object and then did a File->Export PNG Image. In the export dialog I chose to export the selection (all of the raster I just selected.) I then imported the png I made of all the elements. Now they are a single raster. Delete each of the individual rasters and place the mega-raster.
The next issue is your text. When using a script font it is good practice to combine any two touching letters using the Path->Union. If you don’t do this you can wind up with some interesting, and generally unwanted, outcomes. This is not a thing with non-script fonts. In the attachment you can see how I unioned the elcome of Welcome, to, our and ome of Home. I left the capital W and H alone because as independent letters they will be fine. I then grouped all of the text so it moves together.
Finally, I grouped the whole thing and rotated it. This will save you a lot of time after pressing the glowing teal button. It makes your grid lines moot, but there is no need for them anymore, so it’s moot.
Here is what I made from your file. I included the combined png in the zip. Comparing my output to your input hopefully you can see what I did. Once your girlfriend has left of course.
welcomehome.zip (409.4 KB)
I like your layer names . I’ve named a few like that myself. More than a few.