Have you done any interview prep?

Since you keep getting calls, I doubt the minor hiccups in the distant past are the problem...otherwise you wouldn't have got so many calls.

I would suspect it's something in your interview technique. Here are some things I've seen that stood out like sore thumbs...

Cheap/old/out-dated/ill-fitting/wrinkled suits. Drop coin on a GOOD tailored suit. Get new white poly shirts, tie, belt and shoes.

Grooming. Get an expensive haircut 5-7 days prior to the interview (actors have to bring proof of this to the set). Trim nose, ear, eyebrow hair, etc. Got moles like Lemmy? Get them lasered off.

Physical fitness. Not a deal breaker by any means, but it does help with first impressions.

First impression. Utterly vital. Better to be just a little bit too assertive than not assertive enough. Remember names, and use them.

Attitude. DO NOT bad-mouth anything or anybody. Beginning when you leave your house until walk back in the front door. Your regional is a great employer and you love your job, but you'd like to make more money and fly international (if applicable).

Skeletons. When asked about these, in a succinct manner tell what happened, what you learned, and then shut the hell up. Don't go on and on in hopes of positive feedback (this is not confessional). You need to move the process along to other, better topics. Whatever you do, don't blame anyone but yourself for failures. Interviewers may let silence drag out, this is a technique to get you to confess something, don't fall for it.

TMAAT. These are an opportunity to earn points. For each known TMAAT question, have a story ready to go...do not do a deer-in-the-headlights. Pick a story that reflects well on you. Neutral stories are a waste of time and they may wonder why you wasted an opportunity to represent yourself. Negative stories are obviously bad. This is not confessional.

Logbook. Find and account for ALL errors, no matter how far back or how small. If you sucked at logging years ago, at least show you've turned over a new leaf.

Social Media. Lock it down like alcatraz, and clean up anything you can. Unfortunately friends may have tagged you with pictures from parties, etc. If you find any of that, try to get people to remove it.

There are obviously many other factors but this covers some biggies.