20% Disability Raised To 60% On Ab8 Before Receiving Disability Decision

[Absolute]

I filed for an increase in my allerghic rhinitis (0% SC), re-opened claim for sleep apnea w/CPAP in April 2012. Both were claimed on my initial claim in 2007 (received 10% for an tear in a disc in my back and 10% for a badly strained rt shoulder). Sleep apnea was denied 2 times previously. The claim process got all the way to decision notification phase and was sent back to review of evidence but the letter was updated. It seems like I won my claim but I am wondering as well, how far back would the retro pay go since the effective date of my AB8 states May 1, 2012 which is the month after my claim was filed. Would I get paid from the date of my medical evidence (2007) or the effective date and is that why it possibly was sent back for additional review? Any help would be greatly appreciated. Thank you in advance.

[Absolute]

Thank you for the breakdown on that...I could see why it was done the way it was now.