Wood looks OK

One thing I can’t see from this photo is the ledger board. Take a good look post demo to make sure it was properly installed. While unlikely, it’s not necessarily uncommon for people to cut corners on deck installs.

Ledger board should be secured using staggered lag bolts in two rows. Various code depictions can be found online. What can sometimes happen is installers won’t stagger the bolts either correctly, or at all.

Beside this take a look at the hangers and make sure everything is abutting correctly and not pulled away from the ledger. Another common oversight is installers won’t fully attach hangers. Again, code depictions are online.

All of these build issues should be inspected/corrected now before you spend time or money on new decking.

Firstly, attempt to send a check from your banks website instead for no fees.

Secondly, it’s likely an issue with their payment processor and their front end. Either someone selected percentage when they meant dollars or vice versa. Continue to highlight the error to them.

In that case just ride the cobra election window, then.

When did you stop working for your former employer? You usually have 60Days to elect cobra so you could wait for that window to come about to decide.

As for the new job you’re going to want to make sure you know the open enrollment dates. Not all insurance renews 1/1, you’ll have to talk with your new employer about this.