Retrieving the latest emails with MailCore2 - ios

Question

I'm loading my latest emails and I'm saving the latest UID because later if the user reload the list of emails I want to get all the emails from that UID to now... for this, I'm using
UInt64 start = lUid;
UInt64 end = UINT64_MAX;
MCOIMAPMessagesRequestKind requestKind = MCOIMAPMessagesRequestKindHeaders;
MCOIndexSet *uids = [MCOIndexSet indexSetWithRange:MCORangeMake(start, end)];
MCOIMAPFetchMessagesOperation *fetchOperation = [imapSession fetchMessagesOperationWithFolder:#"INBOX"
requestKind:requestKind
uids:uids];
this action always return the results but I'm getting the latest email... So I tried to make
UInt64 start = lUid + 1;
but it is exactly the same.
EDIT
I'm looking the logger and the last UID is 34038 so when i made the call the start parameter was 34039... so why im getting the email with id 34038?
2015-01-20 18:33:06.852 App[25022:730644] mailcore - IMAP: 8 UID FETCH 34039:* (UID ENVELOPE BODY.PEEK[HEADER.FIELDS (References)])
Anyone know whats going on?
EDIT 2:
So this is my code
UInt64 start = lUid + 1;
UInt64 end = UINT64_MAX;
MCOIMAPMessagesRequestKind requestKind = MCOIMAPMessagesRequestKindHeaders;
MCOIndexSet *uids = [MCOIndexSet indexSetWithRange:MCORangeMake(start, end)];
MCOIMAPFetchMessagesOperation *fetchOperation = [imapSession fetchMessagesOperationWithFolder:#"INBOX"
requestKind:requestKind
uids:uids];
void(^fetchHandler)(NSError *, NSArray *, MCOIndexSet *) = ^(NSError *error, NSArray *fetchedMessages, MCOIndexSet *vanishedMessages) {
if( error ) {
completionHandler(UIBackgroundFetchResultFailed);
NSLog(#"Error downloading message headers:%#", error);
}
NSMutableArray *currentMessages = [NSMutableArray arrayWithArray:fetchedMessages];
if( [currentMessages count] > 0 ) {
MCOIMAPMessage *lastMessage = [fetchedMessages lastObject];
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
[defaults setObject:#(lastMessage.uid) forKey:#"lastUID"];
[defaults synchronize];
completionHandler(UIBackgroundFetchResultNewData);
}
else {
completionHandler(UIBackgroundFetchResultNoData);
}
};
[fetchOperation start:fetchHandler];
and this is the logger when i execute that call
2015-01-21 18:02:46.723 App[5021:473470] mailcore - IMAP: * OK Gimap ready for requests from 181.167.207.42 b69mb75112208qhb
2015-01-21 18:02:46.725 App[5021:473470] mailcore - IMAP: 1 CAPABILITY
2015-01-21 18:02:46.955 App[5021:473470] mailcore - IMAP: * CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN
1 OK Thats all she wrote! b69mb75112208qhb
2015-01-21 18:02:46.955 App[5021:473470] mailcore - IMAP: 2 AUTHENTICATE XOAUTH2 dXNlcj1zYW50b21lZ29uemFsb0BnbWFpbC5jb20BYXV0aD1CZWFyZXIgeWEyOS5BZ0VQNnBQNFRJN1ZEMHlwempRNm01bTMwS2J0b0F6VzN6REdBbXc2dmh0VEF1TUJISVVaN3BobEtwY0M4dDlQRVFHcVhETHRlMU5VaFEBAQ==
2015-01-21 18:02:47.267 App[5021:473470] mailcore - IMAP: * CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT
2 OK santomegonzalo#gmail.com authenticated (Success)
2015-01-21 18:02:47.267 App[5021:473470] mailcore - IMAP: 3 COMPRESS DEFLATE
2015-01-21 18:02:47.518 App[5021:473470] mailcore - IMAP: 3 OK Success
2015-01-21 18:02:47.518 App[5021:473470] mailcore - IMAP: 4 ENABLE CONDSTORE
2015-01-21 18:02:47.767 App[5021:473470] mailcore - IMAP: * ENABLED CONDSTORE
4 OK Success
2015-01-21 18:02:47.767 App[5021:473470] mailcore - IMAP: 5 NAMESPACE
2015-01-21 18:02:48.016 App[5021:473470] mailcore - IMAP: * NAMESPACE (("" "/")) NIL NIL
5 OK Success
2015-01-21 18:02:48.017 App[5021:473470] mailcore - IMAP: 6 ID NIL
2015-01-21 18:02:48.267 App[5021:473470] mailcore - IMAP: * ID ("name" "GImap" "vendor" "Google, Inc." "support-url" "http://support.google.com/mail" "version" "gmail_imap_150113.07_p0" "remote-host" "181.167.207.42")
6 OK Success
2015-01-21 18:02:48.268 App[5021:473470] mailcore - IMAP: 7 SELECT INBOX
2015-01-21 18:02:48.770 App[5021:473470] mailcore - IMAP: * FLAGS (\Answered \Flagged \Draft \Deleted \Seen $MailFlagBit1 $MailFlagBit0 $Phishing $Forwarded $MailFlagBit2 JunkRecorded $NotJunk NotJunk $NotPhishing $Junk)
* OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen $MailFlagBit1 $MailFlagBit0 $Phishing $Forwarded $MailFlagBit2 JunkRecorded $NotJunk NotJunk $NotPhishing $Junk \*)] Flags permitted.
* OK [UIDVALIDITY 617846230] UIDs valid.
* 20472 EXISTS
* 0 RECENT
* OK [UIDNEXT 34091] Predicted next UID.
* OK [HIGHESTMODSEQ 4668463]
7 OK [READ-WRITE] INBO
2015-01-21 18:02:48.771 App[5021:473470] mailcore - IMAP: X selected. (Success)
2015-01-21 18:02:48.771 App[5021:473470] mailcore - IMAP: 8 UID FETCH 34092:* (UID ENVELOPE BODY.PEEK[HEADER.FIELDS (References)])
2015-01-21 18:02:49.405 App[5021:473470] mailcore - IMAP: * 20472 FETCH (UID 34090 MODSEQ (4668387) ENVELOPE ("Wed, 21 Jan 2015 20:31:46 -0000" "Subject" (("User" NIL "pullrequests-reply" "company.org")) (("User" NIL "toreply" "company.org")) (("User" NIL "toreply" "company.org")) ((NIL NIL "santomegonzalo" "gmail.com")) NIL NIL "<toreply#company.com>" " <toreply#company.com>") BODY[HEADER.FIELDS (References)] {52}
References: <toreply#company.com
)
8 OK Success