Hi,
As per my knowledge till setting of init pointer you followed all steps correctly, but again why you went to KEB5 tcode in ECC, this is meant for timestamp realignment which has been doing in old flow, I think you can skip this step and just run infopackage with init without data transfer option(since you already did full load) and create one more delta infopackage run it, after doing all this check delta timestamp in KEB2, I guess you know how to check timestamp stuff in this tcode!
Thanks & Regards,
Harish