I was at detox and they gave me subutex but the first day they gave me 16mg the second day was 12mg?

the third day was 8mg fourth was 6 then 4 then 2 on the last day but someone there told me that they get a whole prescription but thats all they choose to give you and they hold the rest is that true

: http://alcoholdrugstreatment.info/i-was-at-detox-and-they-gave-me-subutex-but-the-first-day-they-gave-me-16mg-the-second-day-was-12mg