App Manager Only Shows Partial App Size

I installed games that require further download after installation, and I have the same games on my phone which is Galaxy S4 with 4.4.2 Kitkat. I went to the application manager to move my games to my SD card but it only showed 80.5 MB which is incorrect because I have the same game on my phone and it showed 1.04GB. I tried to move the game to my SD card and it moved about 40 MB but on my phone I was able to move 0.88 GB to my SD card. Is this a bug in Lolipop or is my galaxy tab s working as intended?