Good Alternate Interpretation
You may be right jaymes4u. . . if the posts are correct and only 2 episodes remain, some twist could very likely be in the works to whittle 5 down to 1, so maybe that "still to come" vignette which I saw was some sort of a show-"off" among all rather than just a snippet "tell" from the "3 minutes" after Joe gets called out. BTW, the vignette occurred just before the commercial that aired after WN identified Sarah & Theresa for possible elimination; after that commercial, WN singled out Theresa and she had her "3 minute" moment.
Or Maybe Not . . . Maybe It's Just Out of Cycle Editing
SPOILER. Thanks for confirming that I wasn't seeing things, jaymes4u. Not sure why you may be thinking that maybe Joe saved himself, though. I think what we saw was something from Episode 9, yet to be aired in full.
This series has suffered in the editing department :nono . . . prime example being seeing Paul buy the farm on Episode 2 only to have him back in the series in Episode 3 - never have quite figured out that incredible editing & sequencing error by the production crew: why wasn't the sequence of these episodes swapped?? Most recently, in Episode 8 USO, we saw the exact same female soldier's smiling reaction snippet used for both Dave's "breast reduction" joke, and Joe's "3 tenors" routine" :riiight ; we also saw the exact same snippet of soldiers "dancing" while seated on a tank during both Neal McCoy's performance and Delisco's song :mmm .
I think the "still to come" vignette late in Episode 8 showing Joe doing his routine on the mainstage with Sarah, Delisco, Dave & Jen looking on was a poor-editing misplacement of a "call out" which occurs in a future episode (perhaps 9, maybe 10).
I may be wrong in my guess about the vignette and my assessment of the editing, but, sadly, in an otherwise extremely engaging and well conceived competition reality show, this conclusion about the vignette is consistent the rather slipshod editing which has regularly occurred. I agree with another post; I'd really love to see the keen eye of Mark Burnett applied to this show . . . build the concept around Wayne (and his cadre of superlative entertainer friends) - just as Burnett has done with Stallone, Sugar Ray et al. in The Contender - but if you bring Burnett's more professional production company to bear on the shows few weaknesses, I think you'd get an A-list winner (with Vegas being such a strong cornerstone these days - "Vegas," CSI, the poker shows, etc.).