you sent 1 single SV and got considered? the sim cant have that much effort in - how many HVs were accepted by your post? sounds strange.
bistiza gives some solid advice, but id avoid using the SVs like that - its inefficient. get a handle on how many HVs will be accepted or rejected, send all you wanted in singles, and send extras to CONSERVATIVELY account for the accept/reject rate. for example, in d1, when i want to spend 20k on a guy considering a sim, in the first cycle - i usually spend around 30, maybe 35k. just gotta do it, to get enough accepted to stick.