The alignment info comes from the syncs you made with astrometry (and to be accurate in RA this should **not** be done near the celestial pole, see @jabian comment).
This info is eventually saved into an alignment file (for fixed observatory) and reused between sessions. Your log file starts after the mount driver inititalization, thus I don't know if this is your case.
Look into your <code>.indi</code> directory for a <code>AlignData.xml</code> file (this is the default name), and rename or remove that file.
When you restart your session (and before any sync), the delta RA should now be zero.
I wonder if loading this AlignData file is actually used by fixed observatory users, I believe they make the best polar alignment they can do once, and sync their mounts on every sessions without saving these AlignData.
Maybe this feature could be simply suppressed/disabled, as it seems to create confusion rather than being really useful.