Currently, LM555 or compatible in VSSOP-8 is nearly impossible to obtain. Almost all available LM555 chips are TSSOP-8 and this is what you also shipped on your events. Taking into account the VSSOP-8 footprint is narrower than the TSSOP-8 chip it's a real challenge to correctly solder the chip. This probably wasn't the original intention of this challenge :).