Yep, you sound correct in your analysis
There was a post earlier in the morning where a poster implied they had discussed with UBRG directly this problem. From that post - which was prior to today's release, the poster stated that today's SEC release would replace the original 16 March 2011 plan, as the UBRG organization was not sufficiently 'structured/organized/understanding of SEC regs' (choose your own words here), such that the 16 of March 2011 10% stock dividend could NOT be tracked correctly. Had they been able to track then they would not have released today's new 10%.
The short of it - is buy in to the same level for a few weeks to get the 10%, or sit out, or find out if the earliar was binding in any manner. I don't have a solution for 16 of March people. Sorry.
Frankly, if UBRG releases the 10K for last year in the next week (prior to the 28th), this stock will jump a whole lot. I would not be surprised at a trading halt, especially if they provide the 1st Quarter and give a firm date for the next quarter - and stick to it.