As is typical with Japanese manufacturers, Denon publish dynamic compliance relative to 100Hz, so the compliance value is approximately doubled for a 10Hz reference (which the calculator requires). This will push the result down a few rows in the calculator table.
Regardless, it isn't impossible for a given arm/cartridge combination to sound fine even if outside of the ideal combined resonance frequency range. Too low a frequency and the result is increased suseptability to record warp affects; too high, and the resonant peak can interact with the lowest recorded bass (and rumble) frequencies, causing an unnatural boost, which can waste amplifier power, and/or damage some 'speakers if the volume is high enough.
With a DL103 on such a low mass arm, I'd recommend going with the longest stainless mounting hardware in the drawer in an effort to get the combined cartridge end mass up another gram or two. Some of that extra bass could very well be the foothills of a lower bass peak that could push ESLs closer to arching on some material.
