It does NOT seem to dump the first useless position fix. Went back to my JollaC and I get the same behaviour there, In each case it returns a stale fix. (Using V0.0.10) The C returns in about 15 seconds, the X returns almost straight away. Both return a stale fix which is never updated using this command form. (If I use runs=2 I get updated fix on the second pass)
Even with this issue, many thanks for a great tool!