You, as owner of a share of a share of series R Preferreds, have the same rights as any other owner of shares of series R Preferreds, no matter when you bought.
If I bought shares on December 31, 2007 for $500.00, your shares bought today for ~$4.00 are the same as mine, you just happen to have gotten yours cheap.
Step aside son, you're blockin' the MOMO!
Disproving absence of evidence should be easy, show the evidence of.