As well as Bad Romance stealing the attention away from Telephone (higher on airplay as well as having an amazing video still being talked about), then 100k+ people are getting Telephone through the albums each week, meaning less and less potential buyers every week.
Let's take a look at the real facts:
No performances
No video
Not even TOUR performances
Yet to peak at radio
... almost platinum
oops
There is no digital failure here, try again next single.