Matt Eddy has listed only five transactions, which is consistent with the public transaction records. The CBA, Attachment 46, stipulates that bonus pool money may only be traded "in increments of $250,000, unless the Club is assigning its entire remaining Signing Bonus Pool in a single transaction.".
I don't know, but I would guess that the news reports in late July that referenced $1 million in pool money had reference to the return on the Kendrick and Hellickson trades (e.g., $500k each, or $750k/$250k). The Burdi deal today has been reported at $500k. If these assumptions are correct, that means that the Frohwirth and Lovett/Eldridge deal (which could have been two separate transactions - and at one point the Lovett deal was reported as to the Mariners, and the Eldridge deal to an unknown team, so these may well have been two separate transactions) collectively yielded $750k - or $250k (the minimum) per player traded.
The above is just speculation, but the numbers are plausible, IMHO.