Hi Jessica,
The easiest fix is what Packy_GIS suggested. Only use your 5 GCPs to georeference the model. However, they should be properly distributed over the whole area to get reliable results and measured with a high-accuracy GPS.
Make sure that you have selected the right coordinate reference system that matches the GCPs in the reference settings (tools icon in reference pane). Additionally, adjust the marker accuracy depending on how the GCPs have been measured.
Note. After unchecking all pictures and checking all GCPs, click on the UPDATE icon in the reference pane and then on the magic wand symbol to optimize the cameras. This will adjust your sparse point cloud/tie point cloud. You'll then have to compute the dense point cloud, mesh, orthophoto and DEM again.
Btw, at the moment your DEM seems to have a general tilt (E is high, W is low).
Regards
SAV