EDID capture fakes the presence of the TV so LE/Kodi boots and sees an HDMI connection when the TV is turned off. It does nothing more. It is not a magic cure for old TVs with weird resolutions. Ignore those guides/articles.
Start over with a clean LE12b2 install (newer kernel/drivers and RPi firmware than LE11).
If needed you can force the initial boot splash to 16:9 using "video=HDMI-A-1:1280x720M@60" in cmdline.txt but once Kodi runs it auto-switches based on available resolutions (determined from EDID data) so this does not force Kodi to a specific resolution.
<?xml version="1.0" encoding="utf-8" ?>
<settings version="1">
<section id="system">
<category id="display">
<group id="1">
<setting id="videoscreen.screenmode">
<visible>true</visible>
<default>0128000720060.00000pstd</default>
</setting>
<setting id="videoscreen.limitguisize">
<visible>true</visible>
<default>3</default>
</setting>
</group>
</category>
</section>
</settings>
Display More
Creating /storage/.kodi/userdata/advancedsettings.xml with that ^ content may work to force the initial resolution. If the resolution is not available in the EDID data, it won't work. Start with standard 1280x720 resolution. If the 1360x768 resolution is 1080i it will not work as Kodi only outputs progressive and thus filters/ignores all interlaced modes.