Seams look okay. However, there's a couple spot in question. Not sure if it's due to reflection or it's real. 2nd picture bottom corner, seem like some missing silicone)? 3rd picture, about more than half way from left to right, is silicone cured?
I hope they return your call and take care of the issue with the sump.
I see what you're saying. It's just the crappy pics. SC Aquariums got back to me yesterday and told me they would ship another sump. Hopefully it comes packaged a little better than the last one!