Multiple K petitions
IMBRA states that 2 or MORE (not 1 in the same) petitions need a waiver in subsequent petitions.
A July 21st, 2006 memorandum by Michael Aytes(emphasis added), states:
"B. Filing Limitations
IMBRA imposes limitations on the number of petitions a petitioner for a K nonimmigrant visa for an alien fiancé(e) (K-1) may file or have approved without seeking a waiver of the application of those limitations. If the petitioner has filed two or more K-1 visa petitions at any time in the past, or previously had a K-1 visa petition approved within two years prior to the filing of the current petition, the petitioner must request a waiver. These limitations do not apply to petitioners for a K nonimmigrant visa for an alien spouse (K-3)."
But the database starts at the second petition even if it's for the same beneficiary.
"…Upon approval of a second visa petition under section 101(a)(15)(K) for a fiance´(e) or spouse filed by the same United States citizen petitioner, the petitioner shall be notified by the Secretary that information concerning the petitioner has been entered into the multiple visa petition tracking database. All subsequent fiance´(e) or spouse nonimmigrant visa petitions filed by that petitioner under such section shall be entered in the database. ''(

(i) Once a petitioner has had two fiance´(e) or spousal petitions approved under clause (i) or (ii) of section 101(a)(15)(K), if a subsequent petition is filed under such section less than 10 years after the date the first visa petition was filed under such section, the Secretary of Homeland Security shall notify both the petitioner and beneficiary of any such subsequent petition about the number of previously approved fiance´(e) or spousal petitions listed in the database."
Yet, a US Citizen re-sponsoring the same beneficiary after a consulate returns the petition is now subject to the multiple petition waiver requirement- even though there is only one applying alien! California Service Center correspondence I have seen recently, informs petitioners that:
"The new IMBRA law requires that a second I-129F filed within two years of the first filing contain a waiver…". Such correspondence refers the petitioner to the Michael Aytes Memorandum of July, 2006. Again, note the absence of the words, "…with respect to two or more applying aliens…".
If 2 years between aproved petitions, no waiver needed.
I went with a K3 because we go through the CSC. They have sat on our I-129F and not given an NOA1 yet. See my timeline. It looks like I-130 is our route by negation of the I-129F.
quotes/source cited;
http://www.visajourney.com/forums/index.php?showtopic=53412