Voiceover echo increases from quick load

[TapGhoul]

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I am on Linux, and have found that if I quicksave during some of the echoing dialogue from the computerised announcer (early game), then quickload back into it, the second sound (the echo of the voice) seems to be longer, as in (to exaggerate) let's say you said 1. Normally, you would hear it again 0.2 seconds later, but instead you hear it 0.35 seconds later. That's kinda what's happening (but exaggerated). This only happens for the voiceover line that I quickload back into, and does not happen again unless I re-attempt this. It happens 100% of the time I try it.

I am using Kubuntu 13.10 64-bit My specs: https://dl.dropboxusercontent.com/u/68357640/lshw.html

I am using the beta of the portal 2 beta for linux (as the normal one has issues launching, of which I'm not sure)

This may not only affect linux, but I can't test on any other OS.

EDIT 1: Actually, it's not that. It's any sound that is being played at the time of save is being played twice, the second time with a slight delay. This occurred during sp_a1_wakeup, while going up the lift, the lift sound played from the correct place in the file, but was played twice, the second with a bit of a delay.