This has always worked for me as well (so long as I’m following the rules & using my home resort points first). It’s not a workaround either, bc anyone can go on & book their trip @7mo using any points they’d like. The only difference is that my home priority *might* give me the ability to add those nights on more easily (by not sweating it out right when booking opens since I already have *that* day locked in), but I’m still booking a trip from the 7mo date & any owner can swoop in and grab a date I’m hoping to add on before that window opens.
Example- I booked 2 rooms at AKL for extended family next May. I own at AK, but had already used up most of those points for my own family trip in January. Since I knew competition would be tough at 7 months (for Jambo), I booked the first night for each room with my AK points. Let’s say I booked May 20-21, but really wanted May 20-24. On Oct 19, an owner took May 22 for the std studio I wanted. On Oct 20, I was able to go on & modify both reservations bc it was officially in the 7mo window… the 2-bed savanna room was easy to just add the necessary nights, but I had to switch the std studio to savanna since that had full availability. I used BCV & VGF (same UY) points to complete both bookings. On Oct 21, May 22 showed back up in std view, so I yet again modified to grab the cheaper Jambo room. So, as I said- it isn’t cheating in any way & it ended up not even helping me with the studio. Owners can always come in and get what they want before the 7mo switch.