env_laser glitch
Get out Alex Bell!
After much manipulation, I could not get it fixed. Thankfully I saved an older backup file for the map just for when things get this ugly. All I have to do is remove everything but the functional lasers from the old map, remove the glitched lasers from the newer map, and then paste room after room into the old map. Then once it is all aligned into correspondance to the laser, that I will NEVER touch again, I just save it as a new file.
EDIT: And yes, everything compiled perfectly like nothing ever happened.
Thank you! 
I always thought this one was Alex Bell too!
@Fracture: one question, why don't you use the env_beam entity instead? I read somwhere that the env_laser doesn't work properly into Portal2 but I can seem to remember where exactly or why exactly. I don't know what you are attempting to create but the env_beam is great, even if you need it to damage the player... For your problem, the only thing that comes to mind is to 'center origins', try just in cases...
useful tools and stuff here on TWP 
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Thank you! I always thought this one was Alex Bell too!
I thought that was obvious, especially after this post.
Think of all the things we learned
For the people who are still alive
Other way around. Env_beam is broken, env_laser works.
Really? I do work with the env_beam entity a lot and they DO work perfect... this time I didn't mix them Felix, really 
useful tools and stuff here on TWP [spoiler]
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Try just making the laser, and not setting the end sprite. Then, manually put your own sprite in.
Aperture Science: We do our science asbestos we can!
Sorry to keep coming back, but I just had a brain wave.
What if you put some different lasers somewhere, made them a template, and spawned the lasers where he lasers are supposed to go? Just forcespawn them and kill/disable your other lasers.
Think of all the things we learned
For the people who are still alive
...I....already fixed the problem.....so...yeah
though I wish they would fix all these bugs and glitches in Hammer. I seriously wish i could preview all audio files without having to go to the wiki. And how about finding nodes without volumes? How does one even do that?
Really? I've never gotten an env_beam to work after the DLC2. Would you mind sharing your settings?