There are several anomalies between the early stereophonic issues of Sinatra LP's and their original monophonic counterparts.
In the case of his first released stereo LP, Where Are You?, one track ("I Cover The Waterfront") was dropped due to space limitations. (Stereo grooves being wider than those on mono records, there was less space for the music.) Also, a different take of "Autumn Leaves" was used. (It may be that the stereo masters of the mono take were inferior. In any event, the mono version is exceedingly rare on compact disc, having been issued only on a long out-of-print French compilation.)
On the High Society soundtrack LP, the (studio) version of "You're Sensational" was only recorded in mono to begin with, so fake "stereo" processing had to be utiltized. Also, there is the well-known omission of the film dialog insert by Bing Crosby ("You must be one of the newer fellows") on "Well, Did You Evah?", as discussed at the link in the lead post of this thread.