Uninstall process leaving in the process list after completion uninstall

Good day, developers, please help to solve interresting problems listed below.

I have created uninstaller for my app in addition to pkg file and signed installation file by developer certificate. And i have two problems:
1. After completion deinstallation where my addition uninstaller was executed, uninstaller process is visible in process list, however in UI I get OK message about uninstallation complete. Problem is remain even after removing from uninstaller all code except minimal required for compilation. At least the problem is becoming on N73.
2.On 3250 my uninstaller executable not executing at uninstallation, and I even have not any ideas.

There is my pkg file:
; Note that during installation and uninstallation pkg file is processing from begin to end of pkg
; and not from end to down during uninstall as in S60v2.
;
;Languages

&EN,RU
;
; UID is the app's UID
;
#{"app",
"app"},(0x2000FFFF),1,10,0

; Localized Vendor name
%{"Inc.", "Inc."}
:"Inc."

;Supports Series 60 v 3.0
[0x101F7961], 0, 0, 0,
{"Series60ProductID", "Series60ProductID"}

;Show aggreement
;"..\..\doc\app\english_01\agreement.txt"-"!:\private\2000FFFF\agreement.txt",FT,TE

;Cleanup directory
""-"!:\private\2000FFFF\*.*", FN
;Delete automatically created file
""-"!:\private\2000FFFF\app.ini", FN

;For determine in external uninstaller that uninstall or reinstall
;If uninstaller will not found check file then it would thinkthat currently running deinstallation
""-"C:\System\Data\MyAppBin.bin", FN

"\Symbian\9.1\S60_3rd\epoc32\release\gcce\urel\AppUninstall.exe" -"!:\sys\bin\AppUninstall",FR,RR,RW

{
"\Symbian\9.1\S60_3rd\epoc32\data\z\resource\apps\App_2000FFFF.r01"
"\Symbian\9.1\S60_3rd\epoc32\data\z\resource\apps\App_2000FFFF.r16"
}-"!:\resource\apps\App_2000FFFF.rsc"

"\Symbian\9.1\S60_3rd\epoc32\Data\z\private\10003a3f\apps\App_2000FFFF_REG.RSC" -"!:\private\10003A3F\import\apps\App_2000FFFF_REG.RSC"

"\Symbian\9.1\S60_3rd\epoc32\data\z\resource\apps\App_2000FFFF_AIF.mif" -"!:\resource\apps\App_2000FFFF_AIF.mif"
"\Symbian\9.1\S60_3rd\epoc32\data\z\resource\apps\App_2000FFFF\images.mif" -"!:\resource\apps\App_2000FFFF\images.mif"

"\Symbian\9.1\S60_3rd\epoc32\release\gcce\urel\App_2000FFFF.exe" -"!:\sys\bin\App_2000FFFF.exe"

;required for application to be covered by backup/restore facility
"backup_registration.xml" -"!:\private\2000FFFF\backup_registration.xml"

P.S.
App name 'app' and uid '2000FFFF' are invented.