Left 4 Dead console errors & 'bug' :-(

I'll try to avoid a wall of text and keep this short. I notice certain levels take much longer to load than others, and checking the console, I'm seeing a lot of errors. Here's the ones that show up on the console for the third round the first campaign:

Anyone know how to fix this? I've already tried 'Verifying the integrity of the game cache' and even a complete reinstall of Steam and re-downloading Left4Dead but I am getting the same errors. Google searches turn up no documentation of this.

Another issue I'm having (I think its a bug) is that as an infected in versus mode, I am getting the tooltips for first-time users. Rather than the screen that says Hunter/Boomer/Smoker (and whether or not you can spawn there) I get a screen that tells me I'm an infected and I should spawn. After clicking that away, I get another screen which shows me the primary/secondary attack of the infected I am. Clicking that away, I finally get the screen that allows me to spawn.

This happened shortly after I was experimenting with binding keys and accidentally used y in a bind. I use the console command 'unbindall' then went my keyboard settings and reset to default. I didn't mess with other settings, but those tooltips started up. I've tried disabling hints/tips within the options menu but I keep getting the first-time user tooltips. How do I fix this? I am not using any custom settings/sprays so I wouldn't mind having to reset settings.