Skip updates?

[vampyric_blood]

So i have a verizon m8 that is o operating on straight talk. It is on software version 1.55.605.2. It is stock with the ruu, rooted, s-off and bootloader locked right now. When i try to preform an ota it says it is up to date. Since i know that isnt true, how can i either get the ota to work or can i just grab the ruu for lollipop and skip all the others? Thanks for any help you can give