Light Transport
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
ATC Issue All Types; Conflict Ground Conflict; Critical; Ground Incursion Runway
Human Factors; Procedure
We were repositioning from FBO 1 where we cleared Customs and dropped clients over to FBO 2 to prepare to depart for [destination]. We were given clearance to taxi via Alpha and Papa to hold short of [Runway] 16R. After being told to hold a couple of minutes for other crossing traffic we were given clearance to cross [Runway] 16R at Papa and to join Bravo to FBO. About 10 seconds after being cleared to cross; Ground instructs us to hold short immediately for landing traffic. We advised we were already across the hold short line based on the earlier clearance. We were then cleared to cross once again expeditiously. The other GA aircraft on short final was sent around as a runway incursion would have followed due to our inability to be completely across the hold short line in time.The Ground Controller seemed a bit overwhelmed due to the amount of GA traffic in the pattern and taxiing for [Runway] 16L. We were vigilant in keeping up with what was going on on the ground and did not see much margin for incursions as separate runways were being utilized for GA and jet traffic.When there is a busy traffic pattern double verifying cleared across runway instructions.
We were doing an FBO repo; without pax; from FBO 1 (for Customs) to FBO 2. We were given a clearance to 'taxi FBO 2 via A;P;B; hold short 16R'. While holding short; we heard a plane ask to return to the FBO for mechanical issue. Ground went back and forth with them and then cleared us to cross [Runway] 16R; 'no delay'. [Copilot] read the clearance back and we started rolling. When our nose crossed the hold short line (5 seconds maybe); Ground came back and said 'hold short 16R'. We stopped abruptly and [copilot] told Ground we stopped but our nose is over the line. Immediately; Ground once again cleared us to cross [Runway] 16R. We proceeded cautiously looking at the approach end as we then saw a small plane on short final. As we cleared [Runway] 16R on the other side; we noticed that aircraft had gone around. We were never told to contact Tower. There was never any confusion over the radio or in the cockpit with what our clearance was at any time. Ground didn't call us again.
Corporate jet flight crew reported a runway incursion due to Ground Controller's ambiguity and lack of situational awareness.