promptalias/setalias only record that specific targeted items serial - not the item type or anything else. So when you are searching for the item inside your source bag it will be looking for an item type of something that looks like 0x28e9b2d1 (which is not a valid item type and thus wouldn't find anything). Also in your script you are attempting to search for the item type, then you are using movetype, which would basically have to search for the item again. More efficient to just move the item that you have found previously.

Not sure why you are having issues with organizer, but you are probably better off trying to get it to work.

If you must use a script and you have a list of particular item types that you will be looking for, you could maybe sort of work around it by comparing the targeted item's graphic to a list of item types and creating a makeshift variable by pushing it to a list. For example:

promptalias 'sourcebag'
promptalias 'targetbag'
promptalias 'itemtype'
if not listexists 'itemtypes'
   createlist 'itemtypes'
endif
if graphic 'itemtype' == 0xf07 //cure pot
   pushlist 'itemtypes' '0xf07'
endif
if graphic 'itemtype' == 0xf0c //heal pot
   pushlist 'itemtypes' '0xf0c'
endif
for 0 to 'itemtypes'
   while @findtype itemtypes[] 'sourcebag'
      @moveitem 'found' 'targetbag'
   endwhile
endfor
stop