Currency drop levels aren't correct

[volovikariel]

Currencies don't all have a drop level of 1, for instance, Mirrors have a drop level of 35 just like Exalted Orbs, Chaos has a drop level of 12, so on so forth. The full list is available here: https://pathofexile.gamepedia.com/Currency

[Xeverous]

This project seems dead but just FYI: ItemLevel and DropLevel are not as easy to get as you may think.

• ItemLevel >= DropLevel is not always true, because many items (including currency) have minimal drop levels but always have item level 0 (as seen by filters)
• There is no very easy way to obtain item's DropLevel. The best is to manually test items within filters (which I have done a bit for my own project) and game client datamining.
• Various other properties have special "sentinel" values which filters see if it doesn't make sense for the item to have such property (everything by default has ilvl 0, dlvl 1, ID/corrupted/mirrored/any-other-boolean is false).

Due to these, what you mentioned is just the tip of the iceberg.