Buzzr didn't even get close; they only made it to January 21, 1977. GSN skipped over a fair amount too; here's a really comprehensive episode guide that lists what aired when.
https://erthreetrading.miraheze.org/wiki/Double_Dare_(CBS):_Episode_Guide
Interesting to see an episode guide for this series. I went through weekday TV listings in the NY Daily News to determine when the four preemptions for "Double Dare" would've been (96 reported episodes across 100 weekdays), but I wasn't quite able to make the scheduling snap into place.
There were three occasions when "Double Dare" didn't air at all on either the Eastern or Pacific feed--
Thursday, January 20 -- presidential inauguration
Thursday, March 24 -- "March Magazine"
Thursday, April 21 -- "April Magazine"
On three other occasions (noted below), there was a presidential news conference at 10 a.m. Eastern that preempted "Double Dare" in the Eastern/Central feed. Checking California papers, they were carried live at 7 a.m. Pacific, allowing "Double Dare" to have aired in the later feed -- but were repeats aired on those days, or were some episodes seen only on the West Coast? I guess one would have to consult whatever paperwork Fremantle has.
Wednesday, March 9
Friday, April 15
Friday, April 22