I have had SOME issues with missing fields in the Myra DB as well, but I love it as it is VERY complete for the zones that are, well, completed hehe....
There are a couple of things I would try (not being an expert you may not find it useful, but I DO have my server up and running). I noticed that you are using DR 2 but using the jan24update.sql file... Well, if Im not mistaken there was an update.sql file that came wtih the DR 2 release (not sure what it contained, as I didnt open it just sourced it hehe). Try sourcing this.. And I also noticed you didnt source the dumpeditems.sql, which, if memory serves (and it may not) myra's readme says to source this before sourcing her db... Try this and in this order.. This is what I have done and mine works great.
db.sql
dumpeditems.sql
myradb.sql
myraitems.sql
update.sql
jan24update.sql
The major problem I was having with Myra db was when making anything that has a pet... I noticed they were like lvl 152 and have 49k hp (or something like that). I checked the pet table and something didnt look right (though as I said, I dont know tons about it, just enough to be dangerous I think).. There was NO data and noticed that zone.exe told me it couldnt find the data so using defaults. Sheesh, helluva' default pet. So from the mw_052_053_alpha2.sql db, I exported the whole "pets" table into myradb and everything was gravy after that..... Hope one of these items helps you, if not I just dont know the answer, guess the gurus will have to help
Also, is this happening to you with EVERY spell or just ones that need reagents, and AoE spells... The AoE's mostly dont work (though some do)????
P.S. if you want to fix the Error loading Groundspawns, all you have to do is add the respawn_timer field. Do a search for that error, as I am not sure of the proper syntax. But I did find it here in the forums. Or you could even just export the field from mw db to myra db ( I think it is the same). I noticed that was missing also. Sorry Myra havent made it to the bug page yet, but I AM writing them down... Great DB
Oh by the way, you can export using MySQL in SQL, but I dont know it, so I used MySQLFront, which just connects to your db in a gui type of manner... Awesome proggie.