There's nothing wrong with the snake Laura.
From the feed charts on two male antaresia that I provided when you purchased your snakes, you can clearly see that they fast from mid to late summer for two or three months and have done so since both were sexually mature. We've had a cold summer here in Norcal and you told me both are acting restless which coincides with breeding which coincides with the fast. It's no coincidence that both male antaresia you own aren't eating and acting restless...........and it has nothing to do with any underlying medical conditions.
As to the incomplete shed - it happens. It could stem from a variety of things like being stressed from the newspaper substrate to being handled in the beginning stages of going into blue or due to him getting a lateral rip in his old skin before he could work the head free.