Hi Bruce!
I would suggest that those that have a problem interrupting the rules for Field Day, weather they be AMSAT rules or ARRL rules, contact either myself for the AMSAT rules or the ARRL for their rules. Everyone on this BB can interrupt them anyway they choose but only those in authority to make a ruling can say what the correct interruption is. I would entertain AMSAT's interruption off the list.
Since this has been going back and forth on here, maybe if there was a public announcement on how at least you will interpret the rule per the AMSAT Field Day rules, this discussion could be wrapped up.
When I was on SO-50 and AO-27 Saturday afternoon as W7ON, I made my single contact with a station during each pass. Then I was called by other stations. I responded with my exchange and logged the additional contacts. When I prepare the log and score it for submission to AMSAT and ARRL, I will not count the additional contacts on each of those passes as points. I didn't have that "problem" Sunday morning on an AO-51 pass... I made my contact, listened for another minute or two to ensure noboy else was trying to call me, then I shut down the satellite gear so I could go back to HF.
Another thought... under ARRL Field Day rules, satellites are treated as a single "band", just like any of the HF bands. The ARRL Field Day log sheets have no place to indicate which satellite was used for each contact. I will note the satellite I used for each of those contacts, probably in the right margin of the sheet, for each contact to show I am counting for points only one contact per FM satellite.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/