If Dandridge is annoyed over people knowing he's a vampire, then why is he so reckless with his murders? He brings victims to his home and kills them there (while at least one screamed her head off, loudly). He might as well have rented a billboard for all his lack of secrecy.
I think the implication is that he failed his frenzy resist roll, to use a Vampire: The Masquerade term. He has an inner-beast that comes out when he's enraged, especially when that rage takes him by surprise, such as being stabbed with a pencil, or being blocked by the bouncer. This is lampshaded by the music, with the lyrics "you can't hide from the beast inside of you", and which also talks about how that beast inside will get you killed. Only when things are pleasant can Jerry resist this and be cautious and manipulative.
Arrogance as a Fatal Flaw? Perhaps he's never tried living in small town suburbia before?
What is his cover supposed to be — i.e., a clearly wealthy guy with no obvious job moves in to the neighborhood... Why, exactly? Evil Ed says at one point that it wouldn't be much of a loss if Dandridge killed the whole town, so what is he supposed to be doing there?
For that matter, if he's trying to keep a low profile in small-town America during the AIDS epidemic, keeping a male lover isn't a great strategy. Homophobia alone should have made that town a bad place to hide.
How the hell did Peter get his TV show back?
In the novelisation, it's revealed that nearly the entire teenage population of the town were Peter Vincent fans, and too self-conscious to say so in public. Most of them were infuriated enough by the replacement host (a wisecracking lighting tech) to protest to the station management and get Peter his job back.
How does Evil Ed get into Charlie's house? Mom was not home to invite him in, and she probably wouldn't considering his appearance.
Ed and Charlie have been friends for years, presumably the "invitation" carries over.
Evil Ed promptly turns up full vampire, but Amy apparently has to go through some kind of adjustment period.
Maybe that's why Dandridge went to the trouble of 'seducing' Ed; someone who willingly undergoes the transformation completes it faster than someone hypnotised into accepting it - perhaps Amy was trying to fight it?
Given that he's still around and still a vampire after Jerry's death, he must have killed someone to become a full vampire, rather than staying a half-vampire like Amy, who hadn't killed yet. Probably one of the bullies Jerry promised wouldn't be able to beat him up anymore.
Amy recovers from her vampiric turn at dawn. Ed is vamped the same night, but apparently does not.
As above, Ed possibly completed the transformation faster due to his willingness to be transformed. Or perhaps the transformation is sealed by killing/drinking blood, and Dandridge made sure that Ed did so quickly? It's noteworthy that Jerry and Billy are preparing only one extra coffin in the basement when Peter shows up; it's likely that Dandridge considered Ed a disposable weapon all along.
Given how much of a horror fan Ed is, he probably had thought out just what he'd do if he ever became a vampire (or werewolf, or zombie, etc), and was able to come up with his own coffin or equivalent. Jerry making him a vampire doesn't mean he's making him part of the family, the way he wants to make Amy his lover.
Or perhaps, it's because Ed is, to quote Cordelia Chase "Totally dead, way dead"? In the novelisation, his body turns into dissolving goop (and Charlie's mother was quite upset to find the mess); perhaps the lack of this onscreen plus the Ed voiceover was an example of Executive Meddling? Or did they just run out of money in the SFX budget to do the entire death sequence? Or as implied elsewhere, did Steven Geoffrey's performance inspire a last minute decision to leave Ed's death open for a sequel?
Given that Ed is still around and still a vampire after Jerry's death, the lore of this universe says he must not have been a half-turned vampire like Amy any more, he must have killed someone to become a full vampire before going to Charley's house. Many a Hammer Horror sequel started with someone or something removing the stake from a long-dead vampire's heart, and that vampire coming back to (un)life; Peter Vincent pulled the stake from Ed almost as soon as he stopped moving!
In the sequel, Regine's debut as the new host for Fright Night (the in-universe TV program) features what appears to be an implied dramatization of how she originally became a vampire. If that is the case, who is the one who turned her, and did it have anything to do with why her brother was a vampire as well? Is it possible that her own brother may have even been the one who bit her in the first place after he had already become a vampire?
