ID 1002: Iban's staff (broken) has not been added yet because of the following statement, "Unless one is already owned (broken or not)." Do we have a fail-safe in place so that it doesn't drop one for each kill, should you have a broken staff already in your inventory?

ID 1306-1308: Fremennik blade, shield, and helm are only dropped after completion of The Fremennik Trials. The items have been added regardless; remove them if there is a fail-safe in place to check whether one has completed the Fremennik Trials or not.

ID 1311-1312: Same problem as ID 1306-1308.
ID 1317*-1318: Same problem as ID 1306-1308. *Unspecified Clue scroll (medium) drop rate (rare) but is assumed to be 1/128.
ID 2803-2808: Its drop table exceeds 100% total drop chance; it's quite perplexing. Have removed kebab (1000/9846) and waterskin(0) (1000/9846) temporarily so that I can save the table. https://oldschool.runescape.wiki/w/Lizard

ID 3201-3202: Some mobs, such as this one, have unusual drop tables. Adding all items, as seen in the wiki, increases the total drop chance to more than 100%, and whether it's due to floating-point precision errors remains unknown. Perhaps OSRS' drop tables are built differently. In either case, the drop rate of 44xcoins has been altered to compensate for the inaccuracies. The drop table of ID 3201 has been applied to its idle form, though I doubt it's killable.

ID 3520-3526: When successfully returning a Juvinate to human, Benjamin, Liam, Miala or Verak will hand the player a noted reward. If the Juvinate was returned to a human in Meiyerditch, a Former Vampyre will appear instead. https://oldschool.runescape.wiki/w/Vampyre_Juvinate Nothing has been added.

ID 3531-3534: Same problem as ID 3520-3526.
ID 3537-3538: Same problem as ID 3520-3526.
ID 3576-3578: Same problem as ID 3520-3526.

ID 3808: Three sets of bones are dropped from killing the three riders on the tortoise; likely connected to ID 3815. There is a 10/128 chance of mithril arrows dropping alone, and a 10/128 chance of mithril arrows dropping with the seed drop table. There is a 10/128 chance of rolling the general seed drop table, with the exception of one set of cabbage seeds that are also an individual drop. Upon rolling the fixed allotment seed drop table, mithril arrows are always dropped. Cannot add cabbage with the herb drop table because there is a limitation in the following code: { Id: 65011,1968 Amount: 1,20-59 Drop rate:10/128 } The problem is the quantity. Same goes for the mithril arrows. Also exceeds the total drop chance limit. The drop rate of cabbage has been adjusted.

ID 3819: There is a 10/128 chance of rolling the general seed drop table, with the exception of one set of cabbage seeds that are also an individual drop. Upon rolling the fixed allotment seed drop table, steel arrows are always dropped. There is a 10/128 chance of cabbage dropping alone, and a 10/128 chance of cabbage dropping with the herb drop table. Cannot add cabbage with the herb drop table because there is a limitation in the following code: { Id: 65011,1968 Amount: 1,20-59 Drop rate:10/128 } Same goes for the steel arrows. Also exceeds the total drop chance limit. Swamp toad's drop rate has been adjusted.

ID 3836: Fake Kalphite Queen? Leaving its drop table empty for now; will let someone experienced decide.