Most of the issues with the Giant Simple 3 have been fixed. There was a missing washer on the rear axles which caused it to slide. The side stand was replaced and now holds the bike up. I had to remove and reattach the side stand due to improper installation. The chain was excessively tight and had to be loosened off. A single speed chain requires 1/2″ of slack otherwise it causes chain and bearing wear/damage. The seat adjustment issue has been put on the back burner for now.
The Trek was finally fixed after a poor repair job last year and another bad repair job last week failed to fix it. A test ride today verified everything is working again.
The Supercycle is still waiting for a crank repair and will be down for a while until parts arrive.
Kerosene is recommended for cleaning chains instead of degreaser.