Butch said he saw her leave from his bus, he didn't say she left her car while he was talking to her so why does it matter which side he claimed she left? Either way Butch is a distance away in his bus. This does not equal Butch distancing himself from Maura since he was nowhere near her, it means either he was mistaken (which is possible yaknow, you seem to think witnesses get things right 100% of the time even over a decade later) or Maura did something weird which wouldn't be the first time and could be explained by a concussion and/or drunkenness.
Who are you to determine how credible his wife is? The only thing you've said against her is her story isn't completely consistent 15 years later, i've explained why that is arguably a favourable thing since it rules out coaching. If she was lying it would have been so easy to brush up on what she said originally then just repeat it, the inconsistincies suggests that was an off the cuff interview 15 years later and it's not surprising in that instance she'd not be 100% consistent. There's countless examples of this with witnesses who had nothing to do with the incident, our memories are garbage, LE encounter changing witness stories over long periods of time all the time and they don't immediately think they are lying because that's just what happens. That's why their statement closer to the incident is more reliable meaning her initial statements are probably closer to what actually happened.
I seriously can't believe people make such a big deal about her hair. My girlfriend wears her hair up the majority of the time but i've seen her with her hair down plenty, that's because my knowledge of my girlfriend isn't based on a few pictures of her. But since you asked here: